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A rock of mass m = 1.35 kg is dropped from a height of h = 2.7 m into a pool of water. At a time of t = 1.37 s after striking the surface of the water, the rock's velocity has decreased by 50%. Part (a) What is the magnitude of the average force the rock experiences, F in Newtons, during the time t?
A professor shipwrecked on Hooligan's Island decides to build a telescope from his eyeglasses and some coconut shells. Which lens should he use as the objective
Discuss what it was about about blackbody radiation that classical physics was unable to explain. How did Planck's theory succeed?
a 0.340-m-long cylindrical capacitor consists of a solid conducting core with a radius of 1.00 mm and an outer hollow
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. Her near point is 25 cm from her eye. What is the refractive power of a magnifying glass
Calculate the rotational inertia of a meter stick, with mass 0.83 kg, about an axis perpendicular to the stick and located at the 44 cm mark
A building has two open doors facing the bay. The walls of the building absorb sound well, so multiple reflections can be ignored. Two people are standing a distance L = 150 m from the wall with the open doors, as pictured.
Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2430 kJ/kg at body temperature, what would be the maximum sustainable metabolic rate, in watts, if75% of the energy used by the body ..
We have a hollow metallic sphere with charge -5.0 µC and radius 5.0 cm. What charge now rests on the outer surface of the sphere
An object with total mass mtotal = 14.5 kg is sitting at rest when it explodes into three pieces. Calculate the increase in kinetic energy of the pieces during the explosion
A copper rod has a length of 1.8 m and a cross-sectional area of 4.0 × 10-4 m2. What is the mass of ice per second that melts
Water has a latent heat of vaporization of 2257 kJ/kg. Steam is used to heat a copper tube of 0.358 kg from 21 degrees C to 100 degrees C. All the heating is due to the heat released from the steam condensing. What is the minimum mass of steam that c..
This time, william tell is shooting at an apple that hangs on a tree. the apple is a horizontal distance of 20.0m away and at a height of 4.00m above the ground. what is the arrow's inital velocity
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