A 2.2 kg ball is attached to a ceiling by a string. The distance from the ceiling to the center of the ball is 1.06 m, and the height of the room is 3.00 m. What is the gravitational potential energy associated with the ball relative to the ceiling?
Answers
Answer:
Explanation:
The potential energy associated with a body (m) located at a given height (h) above a reference point is defined as:
At the reference point the potential energy is zero. In this case the body is below the reference point (the ceiling), therefore, the value of h is negative:
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Why are peer reviews important?a. Scientists receive questions and criticism from their peers. b. Data are checked for accuracy. c. Scientists receive comments and suggestions from other scientists. d. all of the abve
A ray of monochromatic light (f=5.09x10^14 hz) passes through air and a rectangular transparent block calculate the absolute index of refraction for the medium of the transparent block Angle of incidence of the light ray as it enters the transparent block from air =40 degrees The angle of refraction of the light ray as it enters the transparent block from air = 20 degrees Calculate the absolute index of refraction from the medium of the transparent block
How are the three cell layers of an embryo related to its development?
What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s?A. 12,000 JB. 6,000 JC. 2,940 JD. 5,880 J
What is the focal length of this lens in air?
Answers
Answer:
The focal length is 12 cm and the lens is converging.
Explanation:
Given that,
Radius, R ₁=10 cm
R₂ =15 cm
Index of refraction n= 1.5
We need to calculate the focal length of the lens
Using formula of focal length
Put the value into the formula
The focal length of the lens is positive so the lens is converging.
Hence, The focal length is 12 cm and the lens is converging.
Final answer:
A biconvex lens is a type of converging lens. Using the Lensmaker's formula and the given values, the focal length of the lens in air is calculated to be 30cm.
Explanation:
A biconvex lens, which is defined by both surfaces of the lens bulging outwards, is a form of converging lens due to its ability to bend parallel light rays toward a single focal point after they pass through the lens. The focal length of the lens can be calculated using the Lensmaker's formula, which is 1/f = (n-1)[(1/R1) - (1/R2)]. Applying the given values, we find that the focal length f = 1/[(1.5-1)[(1/10)-(1/15)]] = 30cm.
Therefore, this biconvex lens is a converging lens with a focal length of 30cm in air.
Learn more about Biconvex Lens here:
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The pulley increases the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
C.
The pulley increases the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward.
D.
The pulley reduces the force needed to lift the load by moving it over a shorter distance. It also changes the direction of the force. As the input force is applied upward, the output force is exerted downward.
Answers
Answer:
B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
Explanation:
When we use pulley system to pull the heavy weight then it is easier to pull the weight upwards because while we use use pulley to pull the objects then the force that is applied on the string is exerted at some angle with the vertical
Due to this we need to apply force at some angle with the vertical and it increase the output force on the object which is to be pulled
So here our effort is in downward direction to pull the object in upward direction
so correct answer will be
B.
The pulley reduces the force needed to lift the load by moving it over a longer distance. It also changes the direction of the force. As the input force is applied downward, the output force is exerted upward.
Answers
8 / 2 = 4 so ur acceleration should be 4
Answers
Answer:
about 7500 km
Explanation:
The mass of planet Katar is 7.27×10^25 kg. The force on the kangaroo is given by ...
F = GmM/r^2
Solving for r, we have ...
r = √(GmM/F) = √(6.67×10^-11 × 78.2 × 7.27×10^25 / 6742) ≈ √(5.62×10^13)
This is in meters, so the radius in km is about ...
r ≈ 7500 km
A. 0.0075 N
B. 0.75 N
C. 750 N
D. 7.5 N
Answers
Obviously D. 7.5
Why?
Well, 7.5 is exactly between 7 and 8.
Answers
Answer:
because they both have large area to capture air
Answer:
Because they have a large surface area to capture moving air when going at a certain speed.
Explanation:
When your trying to fly a kite and the wind isn't that much, you have to run so that the kite can come in contact with the fast moving air which pushes the kite to go up. Just like a eagle because when a eagle is trying to fly, it has to first flap its wings to push air downwards so that it can create lift and at a certain altitude, the eagle doesn't have to flap it's wings though it tilts its body downwards a little so that gravity can do the work, so the eagle is basically gliding downward.