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Object O stands on the central axis of a concave spherical mirror, at a distance of 40 cm. The distance between the focal point and the mirror is 49 cm. What is the magnification m?
A 1.35 block is attached to a spring with spring constant 14. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 50. What are The block's speed at the point where = 0.750 A.
High-altitude mountain climbers do not eat snow, but always melt it first with a stove. Calculate the energy absorbed from a climber's body if he eats 0.70kg of -15?C snow which his body warms to body temperature of 37?C
To improve the efficiency of the engine, it is decided either to raise the temperature of the hot reservoir by 39 K or to lower the temperature of the cold reservoir by 39 K.
Ultrasound with a frequency of 4.25 MHz can be used to produceimages of the human body. What is the wavelength in the body
imagine that you are standing and facing a 60-w incanddescent lightbulb 100m away. if the diameter of you pupils is
A skater with an initial speed of 7.10 m/s stops propelling himself and begins to coast across the ice, eventually coming to rest. How far will the skater travel before coming to rest
What is the final velocity of a hoop that rolls without slipping down a 7.50 m high hill, starting from rest
While visiting the Albert Michelson exhibit at Clark University, you notice that a chandelier swings back, Calculate the frequency of oscillation (in Hertz) of the chandelier
imagine a very heavy cube of pure gold that is 1.40 m on a side. approximate the atoms in this cube as little cubes.
a mass m 16 kg is pulled along a horizontal floor with no friction for a distance d 7.9 m. then the mass is pulled up
Assume a 64 kg boy and a 42 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3 m/s2, find out the magnitude of the acceleration of the boy toward girl.
A large tank is filled with methane gas at a concentration of 0.690 kg/m3 The valve of a 1.37-m pipe connecting the tank to the atmosphere is inadvertently left open for eleven hours. What is the cross-sectional area of the pipe
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