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A 1000kg elevator is being lifted vertically upward by a strong cable.
a) What does the elevator weigh?
b) If the cable lifts upward on it with a force of 10900N, what is the resultant force acting on the elevator?
c) What is the acceleration of the elevator?
The sun is 30 degrees above the horizon. It makes a 48 meter long shadow of a tall tree. How high is the tree
A 65.0 kg human sprinter can accelerate from rest to 10 m/s in 2.90 s. all through the same interval, a 33 kg greyhound can accelerate from rest to 20 m/s. calculate (a) change in kinetic energy and (b) average power output for each.
Explain the velocity of two different objects: heavy rock & light feather. 1st, describe what happens when the two objects are dropped on Earth. 2nd, compare this to what happens on the Moon.
A catcher catches a fastball going 95mi/hr and recoils 12cm while stopping the ball in 0.005s. FIND the average force the ball exerts on the hand & glove
A 75 g piece of ice at an initially unknown temperature is placed into a glass of 350 g of water sitting at room temperature, What is the specific heat capacity of the unknown metal
Each of two small non-conducting spheres is charged positively, the combined charge being 40 µC. Determine the magnitude of the smaller of the two charges
A glass sheet measuring 10cm X 25cm is covered by a very thin opaque coating. In the middle of this sheet is a thin, What is the wavelength of the light in air
Glavin and nicole are running in the bluenose marathon. Glavin stops for a rest when nicole passes him. How long does it take for glavin to catch nicole
Using Gauss' Law, find the electric field (magnitude and direction) between the cylindrical shell and the rod. The electric field will depend on the distance r from the central axis of the solid rod. Find the amount of charge enclosed by the surfac..
A solid, horizontal cylinder of mass 10.0 kg and radius 1.30 m rotates with an angular speed of 5.50 rad/s about a fixed vertical axis through its center. Determine the final angular speed of the system
if the current through a loop radius 50 cm is 2A, what is the magnetic field produced by the loop wire
A 102-N grocery cart is pushed 13.0 m by a shopper who exerts a steady horizontal force.
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