The silk can get a negative charge if it is rubbed against iron rod and it can get a positive charge if it is rubbed against hair.
How to make charges?We know that a charge is made when there is either an excess or a deficit of electrons. When there is an excess of the positive charge on an object, we can say that the object ha become positively charged. If there is an excess of negative charges, we can say that the material is negatively charged. We now want to determine how we could make silk to become positively or negatively charged.
If we want the silk to have a negative charge then we have to rub the silk with a glass rod. If the silk is rubbed with a glass rod, what would happen is that electrons would be transferred from the rod to the silk leaving the silk with a negative charge.
If you want the silk to have a positive charge, you could rub it against hair. In that way, the hair would get an negative charge while excess electrons are transferred to the silk making it to have a positive charge.
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if we could put all the asteroids in the asteroid belt together, their total mass would be .
If we could place all the asteroids collectively, their general mass would be much less than the mass of any terrestrial planet.
The whole mass of the asteroid belt is expected to be 2.39×1021 kg, which is just three% of the mass of the Moon. The 4 biggest items, Ceres, Vesta, Pallas, and Hygiea, account for perhaps 62% of the belt's total mass, with 39% accounted for by way of Ceres on my own. Gravitational tugs from Jupiter avoided fabric from accumulating collectively to shape a planet.
The 4 biggest asteroids inside the belt are known as Ceres, Vesta, Pallas, and Hygiea. these huge asteroids make up about half of the mass of the complete asteroid belt. Scientists like to mention that in case you blended all of those rocky asteroids collectively, it might make a planet a piece smaller than Earth's moon.
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what is the magnitude of positive charges stored on one plate? what is the magnitude of negative charges stored on the opposite plate?
One plate of the capacitor holds a positive charge Q and the other plate holds a negative charge -Q.
When charging a capacitor, a single electron is first added to one side of the capacitor and then the charge moves so that the electron has an electric field that repels the other electrons.
This electric field penetrates space and pushes electrons into the other plate, giving that plate an induced positive charge. This will give you the same amount of charge on both plates.
So one plate of the capacitor holds a positive charge Q and the other plate holds a negative charge -Q.
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A 25.0 kg mass is traveling to the right with a speed of 3.00 m/s on a smooth horizontal surface when it collides with and sticks to a second 25.0 kg mass that is initially at rest but is attached to one end of a light, horizontal spring with force constant 190.0 n/m. the other end of the spring is fixed to a wall to the right of the second mass. what is the frequency?
The frequency of the given mass is 0.31Hz.
Frequency:
the term frequency refers to the number of waves that pass a fixed point in unit time. It also describes the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
Here we have to find the frequency.
Formula to find the frequency:
f = ω /2π
ω = [tex]\sqrt{\frac{k}{M} }[/tex]
= [tex]\sqrt{\frac{190}{50} }[/tex]
= 1.95
Now putting the values we have
f = 1.95/ 2π
= 0.31 Hz
Therefore the frequency is 0.31Hz.
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An astronomical telescope is used to view distant stars. How does the angle between the just-resolvable light from two stars differ if the average light from the stars is red or if it is blue?.
The angle of just resolution light from two stars is greater if the light of the average star is red or if it is blue.
The formula to find the aperture of the telescope
D = 1.22λ/dФ
Limits of resolution:
The limit of resolution is a measure of the ability of the objective lens to separate in the image adjacent details that are present in the object.
There is diffract in the light when it passed through space and gets bent around obstacles. Diffraction grants disperse light according to wavelength, for example, it can be used to produce spectra.
Therefore an astronomical telescope is used to view distant stars. The angle is greater if the light of the average stars is red or if it is blue.
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After energy conversions, you end up with the same total amount of energy as the original amount energy. Which law explains this rule?.
You end up with the same overall amount of energy as you did before energy conversions were made. The law of conservation of energy provides an explanation for this.
What is law of conservation of energy?Energy cannot be created or destroyed; instead, it can only be changed from one type of energy to another, according to the principle of energy conservation. This is especially puzzling in the case of non-conservative forces, where energy is converted from mechanical to thermal but the total amount of energy remains constant. To be used, energy must be transformed from one form to another.
Therefore, the equation U[tex]_{T}[/tex]=U[tex]_{i}[/tex]+W+Q determines the amount of energy in any system.
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humans evolved in earth's atmosphere, therefore the pressures interior to the body are relatively close to atmospheric pressure. because the differences between internal body pressures and atmospheric pressure are so small, individuals have a difficult time gauging the magnitude of atmospheric pressure. suppose an individual is lying on his stomach with sheets of paper stacked on his back. if each sheet of paper has a mass of 0.004400.00440 kg and is the standard letter size of 8.5 in8.5 in by 11 in11 in ( 0.216 m by 0.279 m0.216 m by 0.279 m ), how many sheets must be stacked to produce a pressure on his back equal to atmospheric pressure (roughly 101325 pa101325 pa )?
A total of 151988 sheets of paper are required to be put on the individual so that it create a pressure of 1 atm.
We know that the pressure is given by the force applied on the area divided by the magnitude of the area.
Here, it is given that dimensions of the paper is 8.5 inch X 11 inch.
So the area of the paper is 93.5 in².
Converting inch square into metre square,
Area = 0.06m².
The mass of 1 sheet of paper is 0.004 kg.
So the force applied by the sheet of paper on the person will be equal to,
F = 0.004 × 10
F = 0.04 N.
Let us say that n number of sheets are required.
The pressure that is needed to be created is 101325 pascals.
Now,
Pressure = force/area
Putting the values,
101325 = N(0.04)/0.06
N = 151988.
So, total of 151988 sheets are required.
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a basketball (hollow sphere) starts from rest and rolls down a hill without slipping. the hill is 70 meter high. total mechanical energy is conserved. find the linear speed of the basketball at the bottom in m/s.
The linear speed of the basketball at the bottom in m/s is 37.41 m/s.
The mechanical energy basket ball is conserved and the basket ball starts from rest. and roll down a hill of height 70m.
If mechanical energy is conserved,
Potential energy at top + kinetic energy at top = potential energy at bottom + kinetic energy at bottom.
At bottom, there is no potential energy, and at top, there is no kinetic energy.
Potential energy at top = kinetic energy at bottom.
Mgh = 1/2Mv²
M is the mass of the basketball,
v is the linear speed at the bottom,
h is the height of the ball.
Putting values,
v = √(2gh)
v = √(2x10x70)
v = 37.41m/s.
The speed of the basketball at the bottom is 37.41 /s.
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when an object moves at a constant speed against friction on a horizontal tabletop, there is an increase in the object's a) potential energy b) temperature c) acceleration d) momentum
any procedure where velocity fluctuates
What is acceleration, briefly?
Any procedure where the velocity varies is referred to as acceleration. There are only two methods to accelerate because velocity is both a speed and a direction: changing your speed or changing your direction.
An object has positive acceleration if it is accelerating and travelling in the right direction. Positive acceleration was demonstrated in the first example by the speeding car. The acceleration is in the same direction as the car's motion because it is moving forward and speeding up.
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At any any procedure where velocity fluctuates.
What is acceleration, briefly?Acceleration is the general term for any process where the velocity changes. Because velocity is both a speed and a direction, there are only two ways to accelerate: altering your speed or changing your direction.If an object is accelerating and moving in the appropriate direction, it has positive acceleration. The speeding automobile in the first scenario showed positive acceleration. Since the car is moving ahead and accelerating, the acceleration is also travelling in the same direction.The change in velocity over a specific time period is known as acceleration. Any moment the speed or direction of motion changes, acceleration has taken place. Acceleration is zero at constant velocity. Negative acceleration or deceleration is the term for slowing down.To learn more about acceleration refer to
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the picture tube in a television uses magnetic deflection coils rather than electric deflection plates. suppose an electron beam is accelerated through a 55.0 -kv potential difference and then through a region of uniform magnetic field 1.00 cm wide. the screen is located 6.0 cm from the center of the coils and is 60.0 cm wide. when the field is turned off, the electron beam hits the center of the screen. what field magnitude is necessary to deflect the beam to the side of the screen? ignore relativistic corrections.
The field magnitude required to divert the beam away from the screen is 3.1588 × [tex]10^{-4}[/tex].
A magnetic force is applied to a charged particle when it enters a magnetic field. This force's strength is determined by the particle's speed, magnetic field, and charge density. Fleming's Left Hand Rule determines the force's direction. The component of the velocity transverse to the magnetic field provides the required centripetal force if the charged object arrives at an angle.
V = 55.0 kV
d = 1.00cm
Tan∅ = ((1 ÷ 2) × 60) ÷ 6.0 = 5
∅ = 26.6°
Sin∅ = 1 ÷ R
R = 1 ÷ Sin(26.6°)
R = 1 ÷ 0.44
R = 2.27
Total work completed equals Kinectic Energy change
1 ÷ 2 mv² = qΔV
0.5 × 9.1 × [tex]10^{-31}[/tex] × v² = 1.6 × [tex]10^{-19}[/tex] × 55.0 × [tex]10^{3}[/tex]
v² = (8.8 × [tex]10^{-15}[/tex]) ÷ (4.55 × [tex]10^{-31}[/tex])
v² = 1.93 × [tex]10^{16}[/tex]
v = √1.93 × [tex]10^{16}[/tex]
v = 138924439
v = 1.3 × [tex]10^8[/tex]
The magnetic force produces the centripetal force.
qvB = mv² ÷ R
B = (mv ÷ qR)
B = (9.1 × [tex]10^{-31}[/tex] × 1.3 × [tex]10^8[/tex]) ÷ (1.6 × [tex]10^{-19}[/tex] × 2.27)
B = (11.83 × [tex]10^{-23}[/tex]) ÷ (3.745 × [tex]10^{-19}[/tex])
B = 3.1588 × [tex]10^{-4}[/tex]
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a light plane attains an airspeed of 500 km/h. the pilot sets out for a destination 800km due north but discovers that the plane must be headed 20o east of due north to fly there directly. the plane arrives in 2.0 h. what were a) the magnitude b) the direction of the wind velocity?
a) The magnitude of the wind velocity([tex]V_{ag}[/tex]) is 185 km/h
b) the direction of the wind velocity ([tex]V_{ag}[/tex]) is [tex]22.3^{o}[/tex] southwest
What is relative velocity?Understanding frame of reference is key to understanding relative motion or relative velocity. A frame of reference can be compared to the observer's current motion while they watch an event. For instance, you would consider yourself to be in a stationary frame of reference if you were sitting in a lawn chair and watching a train pass you at 50 meters per second from left to right. From your perspective, the train is moving while you are at rest. If you have excellent vision, you may even see a glass of water on a table inside the train move 50 meters per second from left to right.Calculation
Let east be + x-axis and north be + y-axis
The destination is D= 800 km
This takes 2 hours, so the constant velocity of the plane (relative to ground) is [tex]V_{pg}[/tex] is 400 km
The vector sum of the plane's velocity with respect to the air, which has (x, y) components (500cos70, 500sin70)
and the velocity of the wind relative to the ground ([tex]V_{ag}[/tex]). Thus, (400 km/h) = (500 km/h) cos70i +(500 km/h) sin70j + [tex]V_{ag}[/tex].
Which yields
[tex]V_{ag}[/tex] = (-171 km/h) i – (700 km/h) j
a) The magnitude of the wing velocity is
[tex]V_{ag}[/tex] = [tex]\sqrt{(-171 km/h) i - ( 700 km/h) j}[/tex] = 185 km/h
b) The direction of the wind velocity is
Θ = [tex]tan^{-1} =\frac{-70.0 km/h}{-171 km/h} = 22.3^{o}[/tex] southwest
Hence, the magnitude of [tex]V_{ag}[/tex] is 185 km/h and direction of the [tex]V_{ag}[/tex] is [tex]22.3^{o}[/tex] Southwest.
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According to the vespr model, the best arrangement of a given number of electron domains is _______.
According to the VESPR model, the best arrangement of a given number of electron domains is the one that reduces the repulsion among them.
The VESPR model is also known as VSEPR theory or the valence shell electron pair repulsion theory.
This model provides the 3D structure of the arrangement of electron in an atom.
According to this model, the valence shell electron are involved in the chemical bonding process.
The geometric picture of molecule shows that only valence shell electrons take part in bonding in an ion or a molecule.
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Compare the use of an electric bicycle with a normal bicycle used
to cycle a 5 km uphill route. The cyclist does not pedal when using
the electric bike to cycle uphill.
Information about the two bikes is given in Table 1.
Table 1
Information
power of the motor
force used to drive the
bicycle forward
weight of bicycle
battery life
time to travel 5 km
Electric bicycle
350 W
50 N
190 N
25 minutes
12 minutes
Ordinary bicycle
no motor
47 N
120 N
no battery
13 minutes
Your answer should contain descriptions of work done, energy
transfers, and power.
The work done by the ordinary and electric bicycle are 235 KJ and 250 KJ respectively and the output power of ordinary and electric bicycle are 0.3 KW and 0.35 KW respectively.
W = F d cos θ
P = W / t
W = Work done
F = Force
d = Distance
P = Power
t = Time
θ = 0
d = 5 km = 5000 m
For Electric bicycle
F = 50 N
t = 12 min = 720 s
W = 50 * 5000 * cos 0
W = 250000 J
W = 250 KJ
P = 250 / 720
P = 0.35 KW
For ordinary bicycle,
F = 47 N
t = 13 min = 780 s
W = 47 * 5000 * cos 0
W = 235000 J
W = 235 KJ
P = 235 / 780
P = 0.3 KW
Therefore, the work done by the ordinary and electric bicycle are 235 KJ and 250 KJ respectively and the output power of ordinary and electric bicycle are 0.3 KW and 0.35 KW respectively.
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an iron skillet weighing kg is heated on a stove to . suppose the skillet is cooled to room temperature, . how much heat energy (in joules) must be removed to affect this cooling? the specific heat of iron is
When the iron skillet cools from 178°C to 21°C, the quantity of heat lost is given by.
ΔQ = SmΔT = (0.449 J/°Cg) (1280 g)Δ(21 °C - 178 °C)
= -90231.04 J = -90.231 kJ
The specific heat capacity of a substance is equal to the heat capacity of a specimen of the element divided by the mass of sample.
Also known as specific heat, this is the quantity of energy required to increase a substance's temperature by one degree Celsius in one gram. The units of specific heat are typically calories or joules per gram per degree Celsius. As an illustration, the specific heat of water is 1 calorie (4.186 joules) per gram per degree Celsius.
Between systems or objects with various temperatures, energy is transmitted in the form of heat (flowing from the high-temperature system to the low-temperature system). Likewise called thermal energy or heat energy. The usual units for measuring heat are Btu, calories, or joules.
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Translates into algebraic language: The quotient of the difference of two numbers between their product.
Hello..!
Algebraic language
It is a symbolic way of expressing mathematical relationships with numbers, letters, and symbols.
We translate the statement into algebraic language:
The quotient of the difference of two numbers between the product of them.
The quotient: refers to a division.The difference: indicates a subtraction.Two numbers: let the two numbers be “a” and “b”.Product: denotes a multiplication.The algebraic expression would become:[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \blue{\boxed{ \bold{\boxed{ \bold{\bf \dfrac{a-b}{a \cdot b}}}}}}[/tex]
they are usually present during planet formation and then eventually dissipate. what temperature is the material in this disk at? show your work and explain your reasoning clearly.
A protoplanetary disc, also known as a TTS, is a rotating disc of dense gas encircling a young, recently created star. If the disc is large enough, runaway accretions start, leading to the fast development of Moon- to
Mars-sized planetary embryos in 100,000–300,000 years. The protoplanetary disc, from which planets are (theoretically) generated, is a disc of gas (99% of its mass) and dust (1% of its mass) around a young star.In a sense, the Solar System's "leftovers" can be compared to these debris discs. As the name suggests, asteroids make up the majority of the asteroid belt. Between the orbits of Mars and Jupiter, it can be found in a ring of material.The collapse of the solar nebula was most likely brought on by a shock wave from a nearby supernova explosion. The planets formed in a thin disc around the Sun, which formed in the center of the solar system.To know more about protoplanetary
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what is the work done by the force of gravity on the beachball during this process? give your answer with the correct sign (positive or negative).
The force that pulls items toward the center of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by gravity.
Is work done by gravity positive or negative?Work done by a force is defined as the sum of an object's or particle's displacement and the component of the force acting in the direction of the object's motion.The product of an object's displacement and the component of the applied force that is directed in the direction of the object's displacement is known as the work done by a force.Depending on which way an object is going, the amount of work done to overcome gravity can either be negative or positive.The work done by gravity will be negative if the object goes upward since gravity pulls in the opposite direction from the displacement. The work done by gravity will be positive if an object moves downward since both gravity and displacement are moving in the same direction.To Learn more About gravity refer to :
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as an object falls freely, the kinetic energy of the object * 0/1 a) decreases b) increases c) remains the same d) doubles
The kinetic energy of an object increases as it falls freely.
Potential energy is transformed into kinetic energy when an object falls freely, and kinetic energy is transformed into heat and sound energy upon impact with the ground.
Following completion of the work, energy is transferred to the object, which further moves at a new, constant speed. The sort of energy that is transferred, kinetic energy, is based on the mass and speed obtained. Kinetic energy is a form of energy that can be transformed into other forms of energy and moved between objects.
When something falls, gravity is the cause of the fall. That object experiences a force, which causes it to accelerate, increasing its fall velocity. Gravitational force—the force the Earth exerts on objects—is a type of acceleration. Everything feels the exact same amount of pull from Earth.
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in its daily prowl of the neighborhood, a cat makes a dis- placement of 120 m due north, followed by a 72-m displace- ment due west. (a) find the magnitude and direction of the dis- placement required for the cat to return home. (b) if, instead, the cat had first prowled 72 m west and then 120 m north, how would this affect the displacement needed to bring it home? explain.
To find a solution, we first know about magnitude and displacement.
What is magnitude?
Magnitude typically refers to size or distance. By comparing the size and movement speed of the object, we can relate magnitude to movement. The object's or quantity's size determines its magnitude.
What is displacement?
A one-dimensional quantity called displacement (symbolized as d or s), also known as length or distance, represents the separation between two specified points. The meter is the SI's (International System of Units) accepted displacement unit.
Given that the beginning displacement is 120 meters to the north, the ultimate displacement is 72 meters to the west.
R = (A2+B2)1/2 is the magnitude of the resulting vector A+B.
The angle formed with the west direction is = tan-1(A /B) when = 139.9428m.
(Southeast) = 59.03624 degrees (B) Instead, if the cat had first wandered 120 m north, then 72 m west.
Then the magnitude of the resulting quantity is the same as R, but the angle is different because of = tan-1(72m / 120m) = 30.96375degrees.
Therefore the magnitude is 139.9428m.
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based on the output, which is the best reason to use a power model to describe the relationship between the length and period of a pendulum? the standard deviation of the residuals is small.
The scatter plots of log (length) vs. log (time) have a linear relationship, while the residual plot lacks any discernible patterns.
What is power model equation?Learn to identify situations that can be described by power models, inverse power models, and quadratic models in the "Power Models" unit. You'll also learn to compare patterns in tables and graphs of models with the formulas y = ax2, y = ax3, y = a/x2, y = a/x3, and y = ax2 + bx + c.
They also start to grasp the concept of rate of change within the context of these models. Here, some specific abilities are developed, such as simplifying exponential and radical expressions and solving quadratic equations graphically. The terms and ideas of direct and inverse variation are also taught.
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what does a profilometer do? question 11 options: measures the wavelengths of light emitted or absorbed by an object separates items for chemical analysis uses a laser to measure the heights and depths of toolmarks allows the examiner to see the evidence toolmark and the reference toolmark simultaneously
An instrument called a profilometer is used to gauge a surface's profile and surface finish.
What is a Profilometer & Why is it Used?A profilometer is a tool used to gauge a surface's profile and polish. Surfaces on a small scale can be made up of a series of peaks and valleys that vary in height, depth, and spacing. The surface's ability to create a seal, look glossy or matte, feel smooth or rough, or be used as a wear surface depends on minute variations in these characteristics. Surface roughness or surface finish specifications are frequently specified on technical drawings in industries that manufacture mechanical parts, and profilometers are used to confirm that the specifications have been met.The method of profilometry is used to extract topographical information from a surface.To Learn more About profilometer refer to :
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a car enters the freeway with a speed of 5.9 m/s and accelerates uniformly for 3.3 km in 2.9 min. how fast is the car moving after this time?
The car will move fast with the velocity of 32.03 m/s
What is acceleration?Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.Acceleration is a vector quantity, since it has both a magnitude and a direction. A vector quantity is also velocity. The velocity vector change during a time interval divided by the time interval is the definition of acceleration. The limit of the ratio of the change in velocity during a given time interval to the time interval as the time interval approaches zero determines the instantaneous acceleration (at a specific time and location) For instance, acceleration will be stated in meters per second per second if velocity is expressed in meters per second.Calculation
Initial velocity(u) = 5.9 m/s
Distance traveled = 3.3 km = 3300 m
Time = 2.9 min = 2.9×60 = 174 seconds
Formula,
[tex]s=\frac{1}{2} (u+v)t[/tex]
[tex]3300=\frac{1}{2} (5.9+v)*174[/tex]
[tex]v= (\frac{6600}{174} -5.9)m/s[/tex]
v = 37.93–5.9 = 32.03 m/s
Hence, the car will move fast with velocity = 32.03 m/s
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Nuclear power plant meltdowns can be hazardous. Which of these is a result
related to the meltdown of a nuclear power plant?
O significant changes in sea level in the region
O change in weather conditions in a widespread area
O increased production in carbon dioxide as air pollution
O dangers to the health of people and the environment Science
An astronomical telescope is used to view distant stars. How does the angle between the just-resolvable light from two stars differ if the average light from the stars is red or if it is blue?.
With an astronomical telescope, the angle of just resolution light from two stars would be greater if the light of the average star is red or if it is blue.
What is an astronomical telescope?
An astronomical telescope consists of two lenses: objective and eyepiece.
The objective lens forms the image of a far off object at focal point while eyepiece lens just magnifies the image and make it look more clear, visible and magnified.
The formula D = 1.22λ/dФ is used to find the value of aperture of the telescope.
In general, an astronomical telescope is used to view distant stars. Thus, the angle formed would be greater if the light emitted by the average stars is red or blue.
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Light passes straight through two vertical polarizers. The axes of the filters are aligned parallel to each other. How does the light that passes through the second filter compare to the light that passed through the first filter?.
The direction of the polarized light after passing the first and the second filter are the same, however the intensity of the light after passing the first and second polarizer are half and fourth of its original intensity, respectively.
Light polarization is a filter of electromagnetic waves such that it propagates into one transmission axis only.
When light passes through a polarizer, its intensity will decrease by half.
Suppose the intensity of unpolarized light is I₀, after passing the first polarizer, its intensity becomes:
I₁ = 1/2 . I₀
After passing the second polarizer, the intensity will further decrease by half, or:
I₂ = 1/2 . I₁
I₂ = 1/2 .1/2 . I₀ = 1/4. I₀
Since both polarizers are vertical filters, then the direction of the polarized light after passing the first and the second filter are the same.
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What is the Inertia prasent in a stretched rubber
Answer:
inertia of motion ..........
skydiver refresher test answers why is it important to look ahead during a swoop toward other jumpers in freefall?
It is important to look ahead during a swoop toward other jumpers in freefall because you want to be able to see where they are going, and what they are doing.
If you don't look ahead, you may not be able to avoid them correctly. Looking ahead also helps you keep an eye on your parachute and where it is about other jumpers.
Looking ahead during a swoop toward other jumpers in freefall is important because it allows you to assess the situation and make sure that you aren't going to collide with another jumper. If you don't look ahead, you might not realize that there are people above but be ensure that you aren't colliding to avoid a collision.
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luisa is setting up a simple and cheap studio for her photography shoot by using a bulb inside a reflective shell that directs light forward and clips to the edge of a table. what is this device that luisa is using called?
Luisa is setting up a simple studio for her photography shoot using bulb inside a reflective shell that directs light forward and then clips it to the edge of table. The device that Luisa is using is called clamp light.
What is the importance of clamp light?Clamp light is a kind of lighting fixture used in films that is to hold a screw-in light bulb and sometimes it may also have an aluminum reflector dish and light is mounted with a spring clamp on one side of an open door.
Clamp lights are good addition to any artists or photographers. These are compact as well as portable. These lighting fixtures contain a gripping device so that it can be easily attached to tables, beams and other surfaces.
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A 1 kg water balloon falls downward and experiences a 4.9 N air resistance as it approaches the ground. What is the acceleration of the water balloon when it experiences this air resistance?
answer each problem with only one note
two balls a and b, having different but unknown masses, collide. a is initially at rest when b has a speed v. after collision, b has a speed of v/2 and moves at a right angle to its original motion. find the direction in which the ball a moves after the collision.
If A ball is at rest, the moving ball's velocity vector must point to the center of the stationary ball.
Explain about the velocity vector?A velocity vector shows the rate of change in an object's position. The magnitude of a velocity vector represents an object's speed, whereas the vector's direction represents an object's direction. Velocity vectors can be added or removed in accordance with the principles of vector addition. the velocity vectors' length.
If we just state that a car is moving at 70 km/h, we have not fully described its motion because we have not stated the direction in which it is moving. Thus, a vector quantity such as velocity is an example.
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a 5000 kg airplane is flying a circle with a diameter of 1 km as shown below in the figure. it takes the airplane 30 seconds to complete a trip around the circle. what is the angle of incline of the plane?
The angle of incline of the plane is 65.9°.
What exactly are inclination and plane?A basic device called an inclined plane with a sloping surface is used to lift heavy objects. Even after accounting for friction, the force needed to lift an object up an incline is less than the weight being raised. The needed force approaches the real weight closer with a greater slope or gradient.
m = 5000 kg
F =force by air
Diameter of circle
D = 1000m
R = D/₂ = radius of circle
Fcosθ =mg----1
Fsinθ = mw² R
Fsinθ = mw² R---2
from 1 and 2 ( divide 2 by 1)
tanθ = w² R/g = 4 πR/T²g
tanθ = 4 π 500/30²×9.8
tanθ = 29.236
θ = tan⁻¹(29.236) = 65.9°.
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