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An electron passes during a magnetic field at right angles to the field at a velocity of 4.0 x 106 m/s. The strength of the magnetic field is 0.50 T. What is the magnitude of the force acting on the electron?
What is the acceleration of a bicycle that starts from rest and reaches 6.0m/s after 5.0 seconds? 750-kg solid wood barge has a volume of 1.6 cubic meters. What is its density? A stone is dropped from a cliff and is seen to hit the ground 4.5s late..
Cowboy joe wishes to shoot his assaiat by ricocheting a bullet off a mirrored metal plate. To do so, must he simply aim at the mirrored image of his assaiant? Explain.
A rock is thrown vertically upward from ground level. 1.2 s later it reaches its maximum height and 1.8 s later, what is the height of the tower
A heat engine takes in 126 kJ of heat from a reservoir at 820 K and exhausts 88 kJ to a reservoir at 292 K. What is the efficiency of an ideal engine operating between the same two reservoirs
An astronaut weighs 185 lb on earth. What is her weight on the moon, where the acceleration due to gravity is 5.28 ft/s2
You look directly overhead and see a plane exactly 1.2·km above the ground, flying faster than the speed of sound. Find the angle of the shock wave cone
a boy throws a ball upward from the top of a tower with a speed of 12ms. on the way down it just misses the thrower and
Laser cooling is a modern technique to cool atoms to extremely low temperature. The key point is to tune the laser frequency slightly lower than the nominal frequency of an electronic transition in the atom.
A car is driving 22.7m/s flat ground drives off 42.3 m high cliff. How much time does it take to reach the ground.
A pot of water is boiling less than one atmosphere of pressure. Suppose that heat enters the pot only through its bottom, which is copper and rests on a heating element. In two minutes, the mass of water boiled away is m = 0.43 kg. The radius of the ..
An electric vehicle starts from rest and accelerates at a rate of 1.6 m/s2 in a straight line until it reaches a speed of 20 m/s. The vehicle after that slows at a constant rate of 1.4 m/s2 until it stops. (1) How much time elapses from start to s..
In the isothermal compression of an ideal gas, the volume occupied by the gas is decreasing, but the temperature of the gas remains constant. In order for this to happen, A. heat must enter the gas. B. heat must exit the gas. C. no heat exchange shou..
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