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A proton is to orbit Earth at the equator using Earth's magnetic field to supply part of the necessary centripetal acceleration. In what direction should the proton move?
EastwardWestwardSouthwardNorthward
it takes 7500 J of work to slide a crate a distance of 15 m across a floor. A force of 650 N was applied to the rope. what angle did the rope make with the ground
An object of length 3.00 cm is inside a plastic block with index of refraction 1.40. find where is the object relative to its image
A 0.016-kg bullet traveling at 203.6 m/s east hits a motionless 1.9-kg block and bounces off it, retracing its original path with a velocity of 100.7 m/s west. What is the final velocity of the block
A copper rod has a length of 1.7 m and a cross-sectional area of4.1 x10-4 m2. One end of the rod is incontact with boiling water and the other with a mixture of ice andwater. What is the mass of ice per second that melts? Assume that no heat is lo..
A space explorer A sets off at a steady 0.95c to a distant star. After exploring the star for a short time, he returns at the same speed and gets home after a total absence of 80 years (as measured by earth-bound observers). How long does A's clock s..
A Carnot refrigerator is driven by a small motor whose output of mechanical power is 100W. how much heat will be removed from the cool reservoir in one hour
A flashlight on the bottom of a 4-m deep swimming pool sends a ray upward and at an angle so that the ray strikes the surface of the water 1.70-m from the point directly above the flashlight. What angle (in air) does the emerging ray make with wat..
a disk is rotating about its central axis like a merry-go-round. the angular position deltat of a reference line one
A block of mass m is attached to a string that is wrapped around the circumference of a wheel of radius R and moment of inertia I. Find the moment of inertia of the wheel if its radius is 8.0 cm
Two particles each have a mass of 7.00 10-3 kg. One has a charge of +5.0 10-6 C, and the other has a charge of -5.0 10-6 C. How fast is each particle moving when the separation between them is one-half its initial value
Find the difference in decibel levels β1 & β2 of a sound source is related to the ratio of its distances r1 & r2 and find the average power generated by the horn.
Waterslides are nearly frictionless, hence can provide bored students with high-speed thrills. If Kevin is clocked at 25 m/s at the bottom of the slide, find the work done on him by friction
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