Lying on a bed of nails is one of the most traditional illusions used by magicians. At first glance, it appears like the person lying in the bed of nails will have a hole pierced through their back.
The Force of a Bed of NailsLying on a bed of nails is one of the most traditional illusions used by magicians. At first glance, it appears like the person lying in the bed of nails will have a hole pierced through their back. According to physics, a force exerted downward will be dispersed across the nails, lowering the force that each nail applies individually. The force that each nail exerts decreases with the number of nails.
Given
m=79.2 kg The mass of the Physics Professor
n=1950
The Number of Nails in the Bed of Nails
Solving for the weight of the professor applied to the board of nails
W=mg
W=(79.2 kg)(9.8 ms2)
W=776.16N
Solving for the force applied by the individual nails.
Fn=Wn
Fn=776.16 N1950Fn=0.398
N Therefore each nail applies 0.398 N of force.
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How long does it take an automobile traveling 62.5 km/h to become even with a car that is traveling in another lane at 41.0 km/h if the cars' front bumpers are initially 114 m apart?
The time it will take an automobile traveling at 62.5 km/h to become even with a car that is traveling in another lane at 41.0 km/h if the cars' front bumpers are initially a distance of 114 m apart is 19.1 seconds.
What time will it take for two cars traveling at different speeds to be at the same distance?The time that it will take for the two cars traveling to at the same distance can be calculated below as follows:
Let the time it will take the second automobile be T.
the distance traveled by first car = d
distance traveled by second car = d + 114 m
Time = distance / speedTime taken by first car = d / 41.0
Time taken by second car = d + 114 / 62.5
The two times are equal, hence;
d / 41.0 = d + 114 / 62.5
41d + 4674 = 62.5d
21.5d = 4674
d = 217.4 m or 0.2174 km
distance traveled by second car = 0.2174 + 0.114
distance traveled by second car = 0.3314
Time taken by second car = 0.3314 / 62.5
time taken by second car = 0.0053 hours or 19.1 seconds
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what happens to the speed of a molecule when it hits an oncoming faster molecule? when it hits a receding one?
When it hits a receding one, its rebound speed is reduced.
What is the speed of the molecules?To compute a few more gas properties, the kinetic theory of gases is a little more expanded. It is discovered that the average velocity of a gas molecule is approximately the speed of sound. The pressure is caused by the gas molecules' collisions with the container's walls. The ideal gas model presupposes that the gas molecules are, on average, so far apart that they do not collide. The average separation between collisions (also known as the "mean free path") between gas molecule collisions will be determined.Diffusion, viscosity, and thermal conductivity are only a few of the properties of a gas that are influenced by molecular collisions. A fluid's "stickiness" is determined by its viscosity, while diffusion determines how quickly, for example, an ink drop spreads out in a glass of water. The application of the kinetic theory of gases will be illustrated with a straightforward formula for the diffusion coefficient.To learn more about speed of molecules, refer to
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what initial speed should a particle be given if it is to have a final speed when it is very far from the earth that it is equal to one half of esdcape verlodctyu
The initial speed of the particle is 15.83 km/s.
Consider a system having initial potential energy. With time as the system proceed, the potential energy gets converted to kinetic energy. The kinetic and potential energy changes individually, but the total energy is constant at every instant. This is known as the conservation of energy.
Escape velocity , v = 11.200 km/s
The radius of the earth, R = 6400 km
Let the mass of the particle be m.
Let the mass of Earth be by M.
Let the velocity of the particle be v.
By conservation of energy we have,
(1 ÷ 2)mv² - ((GMm) ÷ R) = (1 ÷ 2)m[tex]v_{e}^{2}[/tex]
where G is the gravitational constant.
The gravitational constant and the acceleration due to gravity is related:
g = GM ÷ R²
Thus equation (1 ÷ 2)mv² - ((GMm) ÷ R) = (1 ÷ 2)m[tex]v_{e}^{2}[/tex] becomes,
(1 ÷ 2)v² - gR = (1 ÷ 2)[tex]v_{e}^{2}[/tex]
v² - 2gR = [tex]v_{e}^{2}[/tex]
v² − 2 × 9.8 × [tex]10^{-3}[/tex] km/s² × 6400 km = (11.200km/s)²
v = 15.83km/s
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The question is -
What initial speed would a particle need to be given at the surface of Earth if it is to have a final speed that is equal to its escape speed when it is very far from Earth? Neglect any effects due to air resistance?
The SI unit for the electric for is __ .
A) Coulomb
B) Newtons
C) Joules
D) Meters
Pick ONE only.
Answer:
The SI unit for the electric for is
A) Coulomb
A 1.5 kg ball is kicked with an initial velocity of 26 m/s at an angle of 30 degrees above the horizontal. How far did the ball go before returning to the ground? Answer in meters.
ANSWER ASAP!!! I AM GIVING EXTRA POINTS!!!! PLEASSEEE HELP!!!
The maximum height travelled by the ball before returning to the ground is 8.62 m.
What is the maximum height travelled by the ball?The maximum height travelled by the ball before returning to the ground is calculated by applying the following kinematic equation as shown below.
H = (u²sin²θ) / 2g
where;
u is the initial velocity of the ballθ is the angle of projection of the ballg is acceleration due to gravityH = (26² (sin 30)²) / (2 x 9.8)
H = 8.62 m
Thus, the maximum height travelled by a projectile depends on the initial velocity and angle of projection.
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A person can jump a horizontal distance of 3.43 m on the earth. the acceleration of gravity is 8.92 m/s how far could he jump on the moon, where the free-fall acceleration is 0.208g? answer in units of m.
A person who jumps a horizontal distance of 3.43 m on the earth will be able to jump a horizontal distance of 16.5 m on the moon.
Using the equation of projectile motion, the maximum distance formula is:
R = u² . sin(2α) / g
Where:
u = initial velocity
g = acceleration due to gravity
α = elevation angle
Assuming that the initial velocities, both on the moon and on the earth are the same both in magnitude and direction, hence the maximum distance is inversely proportional to the acceleration due to gravity.
Therefore,
Rm : Re = ge : gm (m and e refers to moon and earth)
Rm : 3.43 = g : 0.208g
Rm = 3.43 / 0.208 = 16.5 meters
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light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 67% of the intensity of the light passes through the sheet. what angle is the axis of the polarizer oriented, with respect to the vertical?
125.06⁰angle is the axis of the polarizer oriented, with respect to the vertical
given,
Only 67.0% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. No light passes through the second sheet.
for the first sheet we have malus law as
I =I₀cos²θ₁
here(given)
I/I₀ = 0.67
so cos²θ₁ =0.67
θ₁ = cos⁻¹√(0.67)
= 35.06⁰
which is the angle the first sheet makes with transmission axis
here given no light passes through the second sheet i.e. both the sheets are in crossed position
so the angle the transmission axis of the second sheet makes with the vertical is
θ₂ = θ₁ +90⁰
=35.06 + 90⁰
=125.06⁰
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A student wants to collect data during an experiment about the transfer of kinetic energy in a sample of water and ice. Which tool will help her collect the necessary data?(1 point)
Responses
meter stick
balance
thermometer
graduated cylinder
If a student wants to collect data during an experiment about the transfer of kinetic energy in a sample of water and ice, then the tool that will help her collect the necessary data is a thermometer.
What is a thermometer?A thermometer is a device used in different applications in order to measure the temperature in the surrounding environment and or open systems such as organisms (including humans).
Therefore, with this data, we can see that a thermometer can be used to determine the temperature of an organism and also of the surrounding media.
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Answer:
your answer will be thermometer
Explanation:
if you go to connexus and are doing the science
Thermal Energy Unit Test 10 qestions 8th grd unit 5 test lesson 12 here are the correct answers
1. A. metal is heated from room temperature to 200'C.
2. B. The particles will have more space between them as steam, but they will be moving at the same speed in both states.
3. C. The potential energy decreases due to the tighter arrangement of the particles.
4. B. an increase in heat and an increase in kinetic energy until a phase change occurs.
5. C. thermometer
6. B. 4.
7. D. convection
8. C. Air moves from the areas of higher temperature to areas of lower temperature.
9. C. The temperature of the ice increases, while the temperature of the water decreases
10. A. heat transfer by radiation.
i hope this helps and please let me know if it does! = ) <3
a pushing force of 7 n to the right is applied to a book on a table. a frictional force of 3 n is applied in the opposite direction. in which direction will the book move? (1 point)
The book will move in the right direction as the pushing force is greater than the frictional force.
What is the net force?The net force can be defined as the vector sum of all forces acting on an object. The net force is defined as a single force giving same the effect as the original forces on the object's motion.
The net force becomes the resultant force with the same effect on the rotational motion as all original forces took together by the object.
In the question, the pushing force will act in the opposite direction of the frictional force so we can find the net force by subtracting these two forces.
Given, the pushing force to push the box = 7N
The frictional force on the book, = 3 N
The net force on the book = 7N + (-3N) = 4N
Therefore, the net force act in the direction of the pushing force, therefore, the book will move in the right direction.
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Answer:The book will move to the right.
Explanation:
a solenoid is wound with a single layer of insulated copper wire (of diameter 1.0 mm) and is 14.6 cm in diameter and 1.4 m long. how many turns are on the solenoid? assume that adjacent wires touch and that the insulation thickness is negligible.
How many turns are on the solenoid? The number of turns on solenoid are 1.400 turns
To find how many turns on solenoid can be calculated as follows:
Given data,
[tex]d[/tex] (diameter of copper wire) = 1mm = 1×[tex]10^{-3}[/tex]m
[tex]D[/tex] (diameter of solenoid) = 14.6cm = 0.146m
[tex]l[/tex] (length of solenoid) = 1.4m
Next, to determine how many turns on solenoid, we can use the formula below:
[tex]N=\frac{l}{d}[/tex]
[tex]N=\frac{1.4}{0.001}[/tex]
[tex]N=1.400[/tex] turns
Therefore, the number of turns on solenoid are 1.400 turns
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A resistor, an inductor, and a capacitor are connected in series to an ac source. What is the phase angle between the voltages of the inductor and capacitor in this rlc circuit?.
If a resistor, an inductor and a capacitor are connected in series, the phase angle between the voltages of the inductor and capacitor in a RLC series circuit is 180 degrees.
A resistor , capacitor and inductor are key components of a RLC circuit. Resistor doesn't store energy but capacitor and inductor stores energy and that is the reason resistor is called a passive element and inductor and capacitors are called active element.
Inductor leads the current by a phase angle of 90 degrees and the voltage across the capacitor lags the current by 90 degrees, so the phase difference between the voltages of the inductor and the capacitor is 180 degrees in an RLC circuit.
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a 14,000-kg boxcar is coasting at 1.50 m/s along a horizontal track when it hits and couples with a stationary 10,000-kg boxcar. what is the speed of the cars after the collision?
The speed of the cars just after the collision is 0.875 m/s.the formula to be used m1u1 + m2u2 = m1v1 + m2v2.V=14000*1.5÷14000+1000=0.875m/s
How is speed used? What is speed?Teenagers, young adults, and the others take the stimulant drug "speed" to feel more focused and alert, as well as, in some circumstances, to get high. Several types of speed are also used by some people to suppress their appetite.
Why do people drive fast?Simply because they are not paying attention on their driving pace, drivers frequently go above the speed limit. Traffic flow, operating a powerful car, and listening to music were all mentioned as contributing factors. Some drivers claimed that passengers' distraction caused them to accelerate.
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8. a car tire has a radius of 0.26 m. a) how far (path length) does a point on the circumference travel if the wheel is rotated through angles of 30 rad? b) if the car travels 80000 km before wearing out the tires, how many revolutions do the tires make, neglecting backing up and any change in radius due to wear?
a point on the circumference travel if the wheel is rotated through angles of 30 rad is 7.8m
4.9 x [tex]10^{7}[/tex] revolutions if the car travels 80000 km.
What is called radian?The Standard International (SI) unit of plane angular measurement is the radian.A full circle has a radius of 2 pi, or approximately 6.28318 radians.One radian therefore equals around 57.296 angular degrees.The Radius of the tyre = 0.26 m.
Perimeter = 2[tex]\pi r[/tex] =0.52[tex]\pi[/tex]m
When the circle is rotated through an 30rad angle, a point of its circumference travels a distance equal to an 30rad arc of this circle.
a full revolution is 2π rad, then an 30rad angle represents
30/2[tex]\pi[/tex] =15/[tex]\pi[/tex]
15/[tex]\pi[/tex] * .52 [tex]\pi[/tex] = 7.8 m
d = 7.8 m.
the car travels 80000 km
revolutions do the tires = 80000 * [tex]10^{3}[/tex]/ 0.52[tex]\pi[/tex]
=4.9 x [tex]10^{7}[/tex] revolutions.
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a 12-kg hammer strikes a nail at a velocity of 7.5 m/s and comes to rest in a time interval of 8.0 ms. (a) what is the impulse given to the nail? (b) what is the average force acting on the nail?
The impulse of given nail is -90 kg-m/s .
The average force acting on nail is 11250 N .
What is impulse and force?Considering that,
The hammer weighs 12 kg.
The hammer's initial speed when that strikes a nail is u = 7.5 m/s.
At last, it comes to rest when v = 0.
The time is t = 8ms = 0.008 s.
Let J be the impulse applied to the nail in (a). An item receives an impulse equal to a change within the momentum. It comes from:
J = m(v - u)
v = 0
J = -12kg x 7.5 m/s
J = -90 kg-m/s
The impulse is causing motion to move in the opposite direction.
The following provides another definition of impulse:
J = F X t
The average force pushing against the nail is F.
F = J / t
F = 90 kg-m/s / 0.008 s
F = 11250 N .
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Select all that apply.
Salt dissolved in water is a solution, therefore _____.
A. salt and water are chemically combined
B. salt is not chemically bonded to water
C. salt and water retain their own chemical properties
D. the ratio of salt to water may vary
E. the quantity of salt and water is fixed
Answer:B
Explanation:explanation
Yet some men say in many parts of England that king Arthur is not dead, but had by the will of our Lord Jesu into another place. And men say that he shall come again, and he shall win the Holy Cross. Yet I will not say that it shall be so, but rather I would say: here in this world he changed his life. And many men say that there is written upon his tomb this verse: HIC IACET ARTHURUS, REX QUONDAM REXQUE FUTURUS (Here lies Arthur, the once and future king. )A. ) This passage ends the Morte Darthur by holding out the possibility that Arthur may one day return. B. ) This passage ends with romance displacing history. C. ) This passage evinces Malory’s nostalgia for the past. D. ) Both A and C. E. ) A, B, and C
However, some people in many regions of England claim that King Arthur is still alive and has only been transferred by the will of our Lord Jesus to another location. They also assert that he will return and claim the holy cross.
What a name is King Arthur
He was a warrior, a knight, and a king who defeated giants, witches, and other creatures while leading a group of brave adventurers on numerous perilous journeys. He is renowned for bringing the peoples of his realm together and for his Knights of the Round Table. Even though he met a horrible end, he is still revered and honored today in every country. Although some historians suggest that King Arthur was a real warrior who led British armies against Saxon invaders in the sixth century, historians cannot corroborate his existence. Up until his son Mordred reveals the relationship between his queen and best friend, Arthur continues to be a decent and honourable king. Throughout all of these tales, Guinevere is either kidnapped by a villainous lord and must be freed, or other ladies are in need of a brave knight's help
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If you know the acceleration and time, how can you calculate the average velocity?.
The average velocity in terms of acceleration and time is 1/2at².
Average velocity:
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.
Assume the acceleration a is uniform then:
v(t) = u + at
u = initial velocity
By average velocity v we mean average over time than strictly speaking:
v = 1/t [tex]\int\limits^t_0 {v(t)} \, dt[/tex]
= 1/t [tex]\int\limits^t_0 {(u + at)} \, dt[/tex]
= 1/t ( ut + 1/2 at²)
v = u + 1/2at²
If u =0, then we have
v = 1/2 at²
Therefore the average velocity is 1/2at².
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How does the
gravitational attraction
between people
compare to the gravitational
attraction between the
people and Earth?
Attraction between people is Gravitation while people and earth is Gravity.
Every body in the universe attracts every other body with a force called force of gravitation. The attraction between sun and earth , attraction between table and chair lying in a room ..etc. are examples of gravitation. Gravitation is the weakest of four basic forces in nature. However , its most important force as it has its contribution in initiating the birth of stars and controlling the structure and evolution of entire universe.
Gravity is the special case of gravitation. If one of the attraction body is earth then gravitation is gravity.
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naoki's bicycle has a mass of 10 kg. if naoki sits on her bicycle and starts pedaling with a force of 138 n, causing an acceleration of 2 m/s2, what is naoki's mass? a. 71 kg b. 20 kg c. 59 kg d. 69 kg
The correct answer is 59 kg
Given-
Mass of bicycle = 10 kg
F = 138 N
a = 2 m/s²
The mass of any body can be calculated by the force and acceleration of that body. We can use the formula as-
Calculation:
F = ma
m = F/a
= 138/2
= 69 kg
m = mass of bicycle + Naoki's mass. Then
69 = 10 + Naoki's mass
Naoki's mass = 69 - 10 = 59
Naoki's mass = 59 kg
Therefore, the mass of Naoki that sits on the bicycle and is pedalling is 59 kg.
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The car travels 28m in 7s. What is the speed of the car?
The Speed of the car is 4m/s.
What is the speed?
The speed of an object can be defined as the total distance traveled by it in a particular interval of time. This can be determined by dividing the total distance moved by the object by the time taken to move.
It is the ratio of distance in m and time taken by the object to travel in seconds.
Hence: Distance D=28m
Time T=7s
Speed S=D/T
S=28m/7S
S=4m/S
Therefore car's speed is 4m/S
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The speed of the car is 4m/s
What is speed?Speed is the rate of change of distance with time.
It is a scalar quantity and it's S.I unit is given as m/s. Distance is the space or gap between two point. Speed can generally be defined as the distance travelled per a given time
From the definition, speed = distance/time
distance is 28m and time is 4s, therefore
Speed = 28/4= 7m/s.
Therefore the speed of the car is 7m/s
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why must the displacement vector of the lighter ball be scaled by the ratio of masses of the two balls?
If no external force on the Centre of mass remains stationary. In order to do that displacement in lighter body must be more than that of heavier ball.
The sum of the starting momentums of the two bodies when they collide is equal to the sum of their final momentums, according to the law of conservation of momentum.
The experimental system supports the law of conservation of linear momentum when a collision occurs between a heavier ball and a lighter ball in the absence of any other external forces.
The centre of mass does not move due to any external forces. A lighter body must have a greater displacement than a heavier ball in order for that to happen. Changes in an object's position are referred to as displacement. A vector quantity, it has both a direction and a magnitude. An arrow that directs viewers from the starting location to the ending position is used to symbolize it. As an illustration, the position of an object changes if it moves from position A to position B. Displacement is the name for this shift in an object's position.
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the mechanical energy and amplitude of a block-spring oscillator are 7.50 j and 9.40 cm respectively. let the maximum speed be 4.70 m/s. what is the mass of the block?
The mass of the block is 0.655 kg
What is mechanical energy?The combination of kinetic energy, or energy of motion, and potential energy, or energy stored in a system as a result of the arrangement of its components, is known as mechanical energy. A system with solely gravitational forces or one that is otherwise idealized—that is, a system without dissipative forces like friction and air resistance or a system in which such forces may be fairly neglected—has constant mechanical energy.A swinging pendulum has its highest kinetic energy and lowest potential energy in the vertical position, where its speed is greatest and height is lowest, and its highest Energy is constantly moving back and forth between the two forms as the pendulum swings. The mechanical energy of the pendulum, which is the total of its kinetic and potential energies, is constant when air resistance and friction at the pivot are taken into account.Calculation
The mechanical energy of block system,
[tex]E=\frac{1}{2} mv_{max} ^{2}[/tex]
The mass of the block is
[tex]m=\frac{2E}{v^{2} _{max} }[/tex]
[tex]\frac{2(7.50)}{4.70^{2} } =0.6550 kg[/tex]
Hence, the mass of the block is 0.655 kg
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The mass of the block is 0.655 kg
What is mechanical energy?The combination of kinetic energy, or energy of motion, and potential energy, or energy stored in a system as a result of the arrangement of its components, is known as mechanical energy.A system with solely gravitational forces or one that is otherwise idealized—that is, a system without dissipative forces like friction and air resistance or a system in which such forces may be fairly neglected—has constant mechanical energy.A swinging pendulum has its highest kinetic energy and lowest potential energy in the vertical position, where its speed is greatest and height is lowest, and its highestEnergy is constantly moving back and forth between the two forms as the pendulum swings.The mechanical energy of the pendulum, which is the total of its kinetic and potential energies, is constant when air resistance and friction at the pivot are taken into account.The mechanical energy of block system,
[tex]$E=\frac{1}{2} m v_{\max }^2$[/tex]
The mass of the block is
[tex]$m=\frac{2 E}{v_{\max }^2}$[/tex]
[tex]$\frac{2(7.50)}{4.70^2}=0.6550 \mathrm{~kg}$[/tex]
Hence, the mass of the block is 0.655 kg
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a 9 kg hanging mass is connected by a massless cord over a frictionless pulley to a 5 kg block that is sliding on a flat table. if the coefficient of kinetic friction between the block and the table is 0.2, find the tension in the string.
A 9 kg hanging mass is connected by a massless cord over a frictionless pulley to a 5 kg block that is sliding on a flat table. if the coefficient of kinetic friction between the block and the table is 0.2, the tension in the string will be 37.8N
from Newton’s second law we get :
Tension force – f k = mass * acceleration equation 1
Tension force –f k = 5.00 * a
Similarly, for the 9.00−kg mass,
mg - Tension force = mass * acceleration
9.00 * g–Tension force = 9.00 * a
Adding these two equations gives:
9.00 *9.80 − 0.2 * 5 * 9.8 = 14 a
a=5.6 [tex]m/s^{2}[/tex]
substituting this into equation 1
Tension = 5.00* 5.60 + 0.200 * 5.00 * 9.8 = 37.8N
The tension in the string will be 37.8N
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When energy in a system is transformed, what happens to the total amount of energy in the system?
When the energy in a system is transformed, the total amount of energy in the system is always conserved.
What does it mean when energy is transformed?The changing of one form of energy into another, or the movement of energy from one place to another. An energy transformation is a change of power from one form to another. Fire (Chemical energy Heat and Light) Electric lamp (Electrical energy Heat and Light), Microphone (Sound Electrical energy), Wave power (Mechanical energy Electrical energy). Energy transformation is also known as energy regeneration which is a process of changing energy from one form to another. Energy transformations are procedures that convert energy from one type, for example, kinetic, gravitational potential, and chemical energy.
So we can conclude that an energy transformation is the change of energy from one form to another.
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suppose your car's speedometer is geared to accurately give your speed using a certain tire size: 14.5-inch diameter wheels (the metal part) and 4.75-inch tires (the rubber part). if your car's instruments are properly calibrated, how many times should your tire rotate per second if you are travelling at 50 mph?
If the car's speed is 50 mph the tires will rotate 11.68 times per second.
To calculate the rotation of the tire if
Diameter wheels (the metal part) = d₁ = 14.5 inchesDiameter wheels (the rubber part) = d₂ = 4.75inchesSpeed = v = 50 mphFirst, we have to calculate the radius of the wheel.
[tex]R =\frac{d_2 + d_1 + d_2}{2}[/tex]
[tex]R = \frac{4.75 + 14.5 + 4.75}{2}[/tex]
[tex]R = \frac{24}{2}[/tex]
R = 12 inches
Convert the linear velocity.
v = 50 mph
[tex]v = 50 \times \frac{1 \: miles}{1 \: hour}[/tex]
[tex]v = 50 \times \frac{63,360 \: inches}{3,600 \: s}[/tex]
v = 880 inches/s
Formula between angular velocity and linear velocity v = ω R
v = linear velocity = 50 mphR = radius ω = angular velocityCalculate the angular velocity.
[tex]\omega = \frac{v}{R}[/tex]
[tex]\omega = \frac{880}{12}[/tex]
ω = 73.33 radians/s
Angular velocity has a conection with the frequency (how many rotations in second)
ω = 2πf
[tex]f = \frac{\omega}{2 \pi}[/tex]
[tex]f = \frac{73.33}{2 \times 3.14}[/tex]
[tex]f = \frac{73.33}{6.28}[/tex]
f = 11.68 rotations/second
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a resistor r is connected to the terminals of a battery with a potential difference v. as a result of the connection, a direct current i passes through the resistor. if the resistor is replaced by a different resistor with a resistance 3r, what effect, if any, will there be on the current passing through the resistor?
On the basic of Ohm's law , we can see that when resistance increase on replacing then current passing through resistance decreses.
In the given question we have,
resistor r is connected of a battery with potential difference v and a direct current i , passing through the resistor.
According to Ohm's law , the current passing through the condutor is directly proportional to the voltage applied to it and inversely proportional to resistance.
V = IR
where, I ---> current passing through resistor
R----> resistance
V ----> Voltage
or I = V/R ---(1)
Now, it is given that when resistor is replaced by other one and resistance become 3r. From (1) we see as resistance increases the current passing through resistor decreses.
So, as resistance increase by 3r then current passing through resistance decreses by 1/3r.
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what is the relationship between the incident and reflected angles of a beam of light with different types of mirrors?
The relationship between the incident and reflected angles of a beam of light with different types of mirrors that both the angles are equal
According to the law of reflection, the angle of incidence equals the angle of reflection. Irrespective of mirror , whether it is a concave mirror , convex mirror or plane mirror , this law remain same in all condition where the incident angle is always equal to reflected angle .
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Fill in the blanks using the word bank.
Answer: We are unable to see the word bank please update it with a more clear bank word image.
if an input force of 220 n is applied to the handles of the wheelbarrow in the sample problem, how large is the output force that just lifts the load
The output force that only lifts the load is 484 N
What is force?In mechanics, force is defined as any action that tends to maintain or alter the motion of a body or to distort it. The concept of force is commonly explained in terms of Isaac Newton's three laws of motion, which are laid out in his Principia Mathematica (1687). Newton's first principle states that a body at rest or moving uniformly in a straight line will remain in that state until some force is applied to it.The second law states that when an external force acts on a body, it causes the body to accelerate (change in velocity) in the direction of the force. The acceleration is proportional to the magnitude of the external force and inversely proportional to the amount of matter in the body. According to Newton's third law, when one body exerts a force on another, the second body exerts an equal force on the first. This action-reaction principle explains why a force tends to deform (i.e., change the shape of) a body whether it causes the body to move. When studying the motion of a body, it is common to overlook.
Calculation
For this case, the relationship between the two forces is given by
[tex]F_{1} =nF_{2}[/tex]
Where,
F1: output strength
F2: input force
n: mechanical advantage
Then, replacing the values we have:
[tex]F_{1} = 2.2*220[/tex] = 484 N
Hence, the output force that only lifts the load is 484 N
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A charging bull has a kinetic energy of 3,848 J and a mass of 267kg. How much work has to be done to stop the bull?
3848 J work has to be done to stop the bull.
The kinetic energy of an item is the energy that it possesses due to its movement. it's miles defined because the work had to accelerate a body of a given mass from relaxation to its said velocity. Having won this power in the course of its acceleration, the frame continues this kinetic energy unless its velocity adjustments.
Kinetic energy is the electricity an item has due to its movement. If we need to boost up an item, then we have to apply pressure. applying a force requires us to do paintings. After paintings have been achieved, strength has been transferred to the item, and the item may be transferred with a new consistent speed.
Calculation:-
work done = change in kinetic energy
= final kinetic energy - initial kinetic energy
= 1/2mVf² - 1/2mVi²
= 0 - (3,848 )
= 3848 J
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