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The length of a spaceship is measured to be exactly 1/3 its restlength. (a) What is the speed parameter β ofthe spaceship relative to the observer's frame?(b) By what integer factor do the spaceship'sclocks run slow, compared to clocks in the observer's frame?
A typical scuba tank has a volume V of 10 liters. When fully charged, it contains compressed air at a pressure of 200 bars, or 2.0 x 10^7 Pa. What is the uncompressed volume of the air
A 70·kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 37.0° above the horizontal. What is the total work done on the box by all forces
Amber (n = 1.546) is a transparent brown-yellow fossil resin. An insect, trapped and preserved within the amber, How far below the surface is the insect actually located
A candle is held 6.0 cm from the surface of a reflecting ball, and its image appears three-quarters of its actual size. What is the diameter of the ball
A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface. The mass is initially at rest and covers a distance of 5 m in 0.92 s under the action of the force. find the coefficient of friction between the mass and the surface
q1. consider a person of mass 72 kg. what would his mass be if he was composed entirely of neutron-star material of
Lead shielding. When gamma rays are incident on matter, Determine the "half-thickness" for lead, that is, the thickness of lead that would absorb half the incident gamma rays
Your car's speedometer works in much the same way as its odometer, except that it converts the angular speed of the wheels to a linear speed of the car, How fast are you going when your wheels are turning at 520 rpm
An electric motor in a hair dryer is running at normal speedand, thus, is drawing a relatively small current. what happens to the temperature of the coil
Consider the circuit made of a R = 100 resistor, voltage source V , and fuse F. The fuse breaks if the instantaneous current in the circuit reaches 1 A. Which of the following voltage sources can be used in the circuit without breaking the fuse?
its estimated that there are 1028 electrons in you body. suppose one millionth of those electrons were removed from
An electron moves in the positive x-direction a distance of 2.31 m in 2.85·10-8 s, bounces off a moving proton, and then moves in the opposite direction a distance of 1.53 m in 3.33·10-8 s.
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