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A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over an ideal pulley and then to your hand. You pull on the loose end of the rope with a force of 348 N. You weigh 612 N and the seat you sit on weighs 16.0 N.
(a) What is your acceleration?
(b) What force does the seat exert on you?
(a)_____ m/s2
(b)_____ N
A 45cm radius insulated sphere is charged so that the volume charged density is a function of the radius: Charge denisty=(34microC/m^4)r. Integrate to determine the total charge on the sphere.
An astronomical telescope is designed with an overall magnification of 80x. The objective has a focal length of 98.0 cm. How far should the eyepiece be from the objective
A point charge Qpt= 10nC is surrounded by an insulating material and stuffed inside a spgerical steel shell iwth inner radius R1=1cm and outer R0=2cm; What is the net charge of the steel shell
What is the muzzle velocity
question1the unique temperature of the water in the large bowl was 25degc. the temperature of a molecule that changes
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
A 0.40-kg iron horseshoe is dropped into 1.15L of water in a 0.34-kg iron pot initially at 20.0?C. Determine the initial temperature of the hot horseshoe.
A 12.0-V battery produces 215mA when it's across a 42.0? load. What's the battery's internal resistance
A 75- kg child sits in a swing suspended with 3.2- m-long ropes. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is let go
A 214.8 kg satellite is in a circular orbit of 26,273 miles (42,300,000 m) in radius. What is the velocity (speed) of the satellite
q1. a car of mass 1100 kg travelling at 50.0kmhr enters a banked turn covered with ice. the road is banked at an angle
A computer hard disk starts from rest, then speeds up with an angular acceleration of 200.0 rad/s2 until it reaches a final angular speed of 7300.0 rpm. How long does it take for the disk to reach this angular speed
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