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A spacecraft is in orbit around a planet. The radius of the orbit is 3.1 times the radius of the planet (which is R = 71455 km). The gravitational field at the surface of the planet is 22 N/kg. What is the period of the spacecraft's orbit?
a 13 m ladder whose weight is 249 n is placed against a smooth vertical wall. a person whose weight is 959 n stands on
A glass camera with an index of 1.55 is to be coated with acryolite film (n ˜ 1.30) to decrease the reflection ofnormally incident green light (λo = 500nm). What thickness should be deposited on the lens
A 25.0microF capacitor is charged to a potential difference of 800V. The terminals of the charged capacitor are then connected to those of an uncharged 8.00microF capacitor. Compute the original charge of the system
What is an angular speed about the center of mass
displacement vector a points due east and has a magnitude of 3.22 km. displacement vector b points due north and has a
A 0.70 kg ball is moving horizontally with a speed of 9.7 m/s when it strikes a vertical wall. What is the magnitude of the change in linear momentum of the ball
The magnetic field of the brain has been measured to be approximately 3.0 x 10^-12 T. Although the currents that cause this field are quite complicated, we can get a rough estimate of their size by modeling them as a single circular current loop 1..
A seagull flies at a speed of 10m/s directly into the wind. Knowing that it takes the bird 25 min to travel 8km relative to the earth, find the velocity of the wind. How long will it take the seagull to travel a distance of 12km with the wind?
Two equally charged particles each have a mass of .015kg. They are suspended by a light string. determine The magnitude of the repulsive electric force
An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe narrows to half its original radius, what is the flow speed in the narrower section
The centripital force of 45N is required to resolve a stone of mass 100g along a circular path of radius 50cm. Find the constant speed of the stone
What is the tangential acceleration of a bug on the rim of an 11.00 in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 79.03 rev/min in 3.60 s? One second after the bug starts from rest, what is its centripetal accel..
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