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Question: A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s2.
1. What is the magnitude of the normal force of the elevator floor on the dog?
2. What is the magnitude of the force of the dog on the elevator floor?
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
The drawing shows a snapshot of a transverse wave moving to the left on a string. In what direction is point B moving
A playground carousel is free to rotate about its center onfrictionless bearings, and air resistance is negligable. What is the person's mass
A 0.200-kg block along a horizontal track has a speed of 1.40 m/s, What is the spring's maximum compression if the track is frictionless
If its angular acceleration is constant and equal to 0.285rad/s2, what is its angular velocity at time t = 2.65s? Through what angle has the wheel turned between time t=0 and time t = 2.65s?
A -4.0 microC charge is situated at the origin of an xy-coordinate system. What is the electric potential at a point x = 3.0 m due to these two charges
The radial distance from the center of a centrifuge to a sample is 6m. You would like to subject the sample to a normal acceleration of 100g's. What speed of rotation in RPM is needed? If you want the centrifuge to reach this rotational speed from re..
Light with a wavelength of 390 nanometer shines on a metal surface, which emits electrons. Determine what the work function and identify the metal
Visit the Endeavour Space Shuttle (any day) at the Science Center. Fees vary so visit the Reservation Desk for info. For directions click here. It's near USC in downtown LA.
A 1.00 kilogram, horizontal, uniform tray is attached to a vertical ideal spring of force constant 190 N/m and a 270 gram metal ball is in the tray. Find how much time elapses between releasing the system at point A and the ball leaving the tray
question1a cube of ice is taken from freezer at -8.3degc and placed in a 100 g aluminium calorimeter filled with 289 g
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