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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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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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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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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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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which has a greater luminosity, a star with absolute magnitude -2 or a star with absolute magnitude 13 ?
The total amount of energy that a star emits each second is measured by its luminosity.
What is Luminosity and magnitude?Some stars are noticeably brighter than others as one looks up at the night sky above the Earth. A star's brilliance, however, is influenced by its makeup and distance from the planet.A star's apparent magnitude, or how bright it appears to be from Earth, and absolute magnitude, or how bright it looks at a standard distance of 32.6 light-years, or 10 parsecs, are words used by astronomers to describe star brightness. (Light travels approximately 6 trillion miles (10 trillion kilometers) in a year, or one light-year.) A star's brightness, or how much energy (light) it radiates from its surface, is another quantity that astronomers measure.Although the concept of measuring star brightness is not new, astronomers now use more sophisticated tools to make the calculation.
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what would happen if you strike the pipe with supports placed at the nodes for the first vibration mode
If you strike the pipe with supports placed at the nodes for the first vibration mode, you will experience a vibration that has a frequency of about 5 Hz.
The amplitude of this vibration will be approximately 1.5 mm and it will occur in a single direction. This means that the pipe will vibrate up and down, but not side to side.
The vibrations caused by striking the pipe will not last very long. In fact, they are only likely to last for about 0.1 seconds before they disappear entirely. They may also cause damage to nearby objects like walls or furniture if they are located too close to where you strike the pipe.
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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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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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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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What is the Inertia prasent in a stretched rubber
Answer:
inertia of motion ..........
What happens to the energy in a system of magnets when the magnetic force causes two magnets to move?.
When the two magnets are made to move, the energy of the system in the system tends to change potential energy into the kinetic energy
Potential energy is the energy stored in the body while is at rest which would turn into kinetic energy when the object will initiate motion. This conversion of potential energy to kinetic energy is understood by the Work-Energy theorem. The kinetic energy is formulated as,
K.E. = 1/2 mv²
where K.E = Kinetic energy
m = mass of an object
v = velocity of the object
The work-energy theorem is stated as the products of all the forces acting on the system are equal to the difference in kinetic energies.
∑W = ΔK.E
where W = Work done on the system
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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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is there a way of getting the cockpit from turning black after you get so high on the x plane 11 avro rj 100 jet?
Slewing the aircraft at low altitude is the only way of getting the cockpit from turning black after you get so high on the x plane 11 avro rj 100 jet. These are the traditional aircraft variety.
If you fly at high altitude in an aircraft which is not pressurized (or with wrong pressurization settings), the cockpit and external views will darken and then go black. If it happens, try slewing the aircraft at low altitude (<10.000 ft) and see if the image reappears after a while.
An aircraft is a vehicle or machine that is able to fly by gaining support from the air and has cockpit. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.
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to what maximum height can water go as it goes into a 3.19-cm-diameter nozzle from a 9.00-cm-diameter fire hose while carrying a flow of 30.5 l/s? ignore drag, and assume that the nozzle points straight up.
Bernoulli's equation formula is a relation between pressure, kinetic energy, and gravitational potential energy of a fluid in a container. The formula for Bernoulli's principle is given as follows: p + 1 2 ρ v 2 + ρ g h = c o n s t a n t.
An object's kinetic energy is the energy it has as a result of motion. Applying force is necessary if we want to accelerate an object. We have to put in work to apply a force. After the work is finished, the object will be moving at a new, constant speed because energy has been transferred to it. The science of fluid mechanics examines how fluids—including liquids, gases, blood, and plasma—behave both at rest and while moving. There are numerous uses for fluid mechanics in astrophysics, chemical and mechanical engineering, and biological systems.
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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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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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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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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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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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imagine we've discovered a planet orbiting another star at an average distance of 1 au with an orbital period of 6 months. the planet has a moon that orbits the planet at the same distance as our moon, but it takes 2 months to complete an orbit. what can we infer about this planet?
This planet is less massive than the Earth, as we can deduce.
What is meant by the orbital period?
A measure of how long it takes for one complete orbit of a celestial body to complete In terms of time, "the orbit period depends on the satellite altitude." the length of time needed for one cycle of a phenomenon that repeats itself frequently.
What are rotation and revolution?
An object rotating around its axis is referred to as turning. An object's orbital movement around another thing is called a "revolution." A 24-hour day, for instance, is created when the Earth rotates on its axis. The 365-day year results from the Earth's rotation around the sun.
Therefore, it is lesser massive than Earth.
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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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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]
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
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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what is the direction of the frictional force exerted on a coffee cup being pulled to the right across a table?
To the left. When a force is applied to stop it from moving, frictional force provides resistance.It always moves in the opposite direction of an item in motion
What is meant by frictional force?When a force is applied to stop it from moving, frictional force provides resistance.As a result, it always moves in the opposite direction of an item in motion.Friction acts on the right when force is applied to the left. The force produced by two surfaces coming into contact and sliding against one another is referred to as frictional force.The following variables impact the frictional force:Surface roughness and the amount of force pressing them together have the biggest an impact on these forces.A force that is applied to an object by a person or another object is known as an applied force.A desk is being subjected to applied force if someone is pushing it across the room.The person's force applied to the desk is known as the applied force.To learn more about frictional force refer
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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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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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how does the frequency of the transverse wave change as it moves into a new medium, from a gas to a liquid?
Transverse waves cannot be formed in liquids or gases because they lack the ability to bend their shape. Transverse waves include, for instance, light waves.
What is Transverse wave?Transverse waves are a particular sort of wave motion where the particle movement is perpendicular to the direction of wave propagation. Both the surface of liquids and solids can produce it.A traveling wave whose oscillations are perpendicular to the wave's direction is said to be transverse. By fastening one end of the string and moving the other up and down, you can easily make a wave on a horizontal piece of string.Because the particles move in a direction that is opposite to the direction of the wave, this sort of wave is given its name. Transverse waves may be electromagnetic or mechanical in nature. A disturbance that moves through a medium is called a mechanical wave.To learn more about Transverse wave refer to:
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What type of mirror is being used in the image?
A. Plane
B. Concave
C. Convex
Answer:
b) Concave mirror
Explanation:
The type of mirror being used in the image is concave mirror. Dentist always use concave mirror to see patient's teeth. Hence, the option (b) is correct answer.
Answer: b or
✔ concave
Explanation:
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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