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Electrons produced by a certain device are observed to travel in a circular path with a radius of 2.0 cm when placed in a uniform magnetic field whose strength is 10 MN/C. What is the speed of the electrons emitted by this device? (You may express this speed as a fraction of c.)
A noisy grinding machine in a factory produces a sound intensity of 1.0 x 10^-5 Watts/meter^2. Deteremine the sound intensity level
A weather emergency siren is mounted on a tower, 177 meters above the ground. On one hand, you would like to make the siren very loud so that it will warn as many people as possible. what is the maximum power that the siren can put out
A large crate is pulled along a horizontal path at a constant speed by a cable that is inclined at an angle of 20° with respect to the horizontal. How far will the crate move in 10 seconds
On the planet Zardem, the standard unit of time is the Zarsec, or Zs, where 1 Zs = 2.2s. how fast is the runner traveling
A plate carries a charge of -3.9 µC, while a rod carries a charge of +2.2 µC. How many electrons should be transferred from the plate to the rod, so that both objects have the same charge.
What is the wavelength of the light in the glass
A concave mirror produces a virtual image that is seven times as tall as the object. What is the focal length of this mirror
A block with a weight of 7.7 N is at rest on a horizontal surface. What is the magnitude of the force of the block on the horizontal surface
A box of books weighing 327 N is shoved across the floor by a force of 471 N exerted downward at an angle of 35° below the horizontalIf μk between box and floor is 0.52, how long does it take to move the box 4.80 m starting from rest.
Optimus Prime is flying straight up at 44 m/s when he accidentally drops his mega-ray blaster and it falls 65 m to the ground below. Calculate how long it takes for his mega-ray blaster to hit the ground.
The work done by an external force to move a -8.90charge from point a to point b is 1.80×10?3 . If the charge was started from rest and had 4.87×10^4 of kinetic energy when it reached point b, what must be the potential difference between a and b?
The aorta is a major artery, rising upward from the left ventricle of the heart and curving down to carry blood to the abdomen, what is the magnitude (in m/s2) of the blood's centripetal acceleration
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