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Q. What velocity would a proton need to circle Earth 1400 km above the magnetic equator, where Earth's magnetic field is directed horizontally north and has a magnitude of 4 x10-8 T?
Q. A rocket engine emits 2.0 X 10^5J of sound energy every second. The sound is emitted uniformly in all directions. what is the sound intensity level, measured relative to the threshold of hearing, at a distance of 85m away from the engine?
What is the total mass of the reagents used in the combustion throughout the 30 days . The ball makes 17 oscillations in 16 seconds. What is it the mass of the ball.
An unstretched spring with spring constant 21 N/cm is suspended from the ceiling. A 3.3 kg mass is attached to the spring and let fall. To the nearest tenth of the centimeter, how far does it stretch the spring.
What is rms speed of the atoms at temperature
Before starting this problem, review Conceptual. The force vector A has the magnitude of 75.0 newtons (N) and points due east. The force vector B has a magnitude of 101 N and points 72.9 ° north of east.
A gun shoots bullets that leave the muzzle at 213m/s. If a bullet is to hit a target 160.4m away at the level of the muzzle, the gun must be aimed at a point above target. (Neglect air resistance.)
Boat A negotiates a curve whose radius is 370 m. Boat B negotiates a curve whose radius is 120 m. Each boat experiences the similar centripetal acceleration. What is the ratio of speed of boat A to that of boat B.
As an energy-efficiency consultant, you're asked to assess the pumped-storage facility. Its reservoir sits 136 above its generating station and holds 9.0×10^9 of water. The power plant generates 315 of electric power while draining the reservoir over..
A solid cylinder with mass and radius, rotating with angular speed about an axis throughout its center, is set on the horizontal surface for which the kinetic friction coefficient is.
The rms electric field of an electromagnetic wave increases from 286 to 858 N/C.find the wave intensities for the two values of the electric field.
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
A tow truck pulls a car 5.2 km along a horizontal roadway using a cable having a tension of 790.
Find the Youngs modulus for the muscle tissue
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