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A modern sculpture has a large horizontal spring, with a spring constant of 275 N/m, that is attached to a 53.0-kg piece of uniform metal at its end and holds the metal at an angle of θ = 50.0? above the horizontal direction. The other end of the metal is wedged into a corner as shown. By how much has the spring stretched?
Consider the equation for the velocity of an electromagnetic wave in a wire on the bottom of page 621. Under what conditions would this velocity be greater than c (the speed of light)?
In this experiment, they fired alpha particles with an initial speed of 1.55x107m/s at a thin sheet of gold. (Alpha particles are obtained from certain radioactive decays. They have a charge of +2e and a mass of 6.64x10-27kg.) How close can the al..
A toy spacecraft is launched directly upward. When toy reaches its highest point, a spring is released and the toy splits into two parts with masses of .c2 kg and .08 kg.
A 60 cm long rod has a 4.00 kg mass on one end and a 6.00 kg mass on the other end. How far from the center of the rod is its center of mass
The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.20 with the floor. find in how short a distance the train can be stopped at constant acceleration without causing the crates to slide over the f..
A yo-yo has a rotational inertia of 977 g•cm2 and a mass of 117 g. How long does the yo-yo take to reach the end of the string
a spherical ball hanging on a string on a smooth, frictionless wall. The mass of the ball is m, its radius is R, and the length of the spring is L. Find the normal force between the ball and the wall
An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 25 cm. What is the relative permeability KB of the iron core
A force F = ( 2 i + 2 j ) N acts on a particle that undergoes a displacement ?r = (-6 i - j ) m. Find the work done by the force on the particle
A charge of 3.7C moves from the positive to the negative terminal of an 8.7V battery. How much energy does the battery impart to the charge
A 1.8-kg block slides down a fixed, rough curved track. What is the change in mechanical energy of the block coused by the force of friction during this descent
Two 42 ohm resistors are connected in series to a 12 volt battery. What is the current through the circuit
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