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Spaceman speff orbits planet x with his spaceship. To remain in orbit at 556 km from the planets center, he should maintain a speed of 85 m/s. What is the mass of planet x?
7.1 x 10^17 kg6.0 x 10^19 kg6.0 x 10^16 kg7.1 x 10^14 kg
A car with mass of 1000.0 kg accelerates from 0 m/s to 40.0 m/s in 12.0 s. Ignore air resistance. What is the average mechanical power output of the engine
A piece of metal weighs 53.6 N in air, 35.0 N in water, and 42.2 N in an unknown metal. What is the density of the unknown liquid
A positive charge Q1 = 3.00 µC is in the origin and a negative charge Q2 = -5.00 µC is at point x = 11m. Find the position of point P between the charges, where the electric potential equals zero.
A wave has an amplitude of 0.25 m, a frequency of 5 Hz and a wavespeed of 4 m/s.a. Write the displacement equation for the wave
consider the electrons of a speed .99999999967c of produced by the stanford linear accelerator, what is the magnitude of momentum of such an electron
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
Suppose a 7.1 eV electron and a 9.77 eV positron collide, Find the frequency of these new photons
Two 7.0mm×7.0mm electrodes with a 0.10-mm-thicksheet of Mylar between them are attached to a 7.0Vbattery, What is the electric field before and after the Mylar is withdrawn
The springs of a 1600 kg car compress 5.0 mm when its 65 kg driver gets into the driver's seat. If the car goes over a bump, what would be frequency of vibrations.
Some bacteria are propelled by biological motors that spin hair-like flagella. How long does it take the motor to make one revolution
A crane lifts a 2000kg load 40 meters. what will be the work done by the load? If it takes 8 seconds to do this work what is the power output for the crane
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber, what is the area (in m2) of the leaf
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