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A penny slides off a table 30in high and falls straight to the floor. How long does it take for the penny to fall?
In an experiment 70 gram of ice at 0 degrees Celsius is dropped into 300 gram of water at 50 degrees Celsius. what is the final temperature of thermal equilibirium
A 7.5 nC charge is located 1.8m from a 4.2 nC charge. Find out the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive.
q1. a 9.05 kg projectile is fired vertically upward. air drag decreases the mechanical energy of the projectile-earth
An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius.
The electric potential at x = 3.0 m is 120 V, and the electric potential at x = 5.0 m is 190 V. What is the electric field in this region, assuming it's constant? -140 N/C 140 N/C -35 N/C 35 N/C 75 N/C.
Three moles of an ideal monatomic gas expands at a constant pressure of 2.60 atm, Calculate the amount of heat added to the gas
A cue ball, which has a mass of 0.17 kg, collides head on with a stationary 8 ball, what was the speed of the cue ball before and after collision
You are spin coating a thin layer of polymer onto a reflective silicon wafer to create an organic solar cell device. What thickness would you determine the film to be
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
The position vector of a particle of mass 2.10 kg as a function of time is given by rarrowbold = (6.00 ihatbold + 4.00 t jhat bold), Determine the angular momentum of the particle
A woman walks 300m in the direction 30° east of north, then 300 m directly east.
An x-ray tube accelerates electrons from rest at 5.0×10 14th m/s(squared) power through a distance of 20cm . (Such high accelerations are possible because electrons are extremely light.) Find the electrons'velocity after this acceleration. Find th..
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