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On a day when the temperature is 20 degrees C, a child steals your tuning fork of frequency 512 hz, begins ringing it, and runs away. You chase after the child running with a speed of 5m/s. if you hear a frequency of 510hz, how fast is the child running?
The Royal Gorge bridge over the Arkansas River is 310 m above the river. A 61-kg bungee jumper has an elastic cord with an unstressed length of 60 m attached to her feet. Assume that, Find the maximum speed of the jumper
A cannonball sits on top of a 10 meter cliff and is fired at a 10 degree angle with an initial velocity of 50 m/s. What is the maximum height of the cannonball relative to the ground? At maximum height what is the magnitude of the velocity? How lo..
Two cars are on the highway and moving at speeds of v1 = 14.5m/s and v2 = 70.2m/s. What is the frequency of the second car's engine
A 1300N crate slides 15m down a ramp that makes an angle of 35 with the horizontal. If the crate slides at a constant speed, how much thermal energy is created
consider two ZAMS stars: 09 and B0. The effective temperature of the 09 star is 34,500 k. Assuming a hydrogen density of 10^8 m^-3, and Alpha = 3.1 x 10^-19 m^3 s^-1, estimate the Stromgren radius of the stars in pc and AU
You are with 11 other people on a boat at rest in frictionless water. The group's total mass is 858kg, How far does the boat move
Vector has a magnitude of 63 units and points due west, while vector B has the sasme magnitude and points due south. Find the magnitude and direction of a) A + B and b) A - B. Specify the directions relative to due west.
A motorcycle traveling with a constant acceleration of 2.0 m/s sq crosses a 100 m long bridge in 4.23 sec. What was the velocity at the end of the bridge
500 kg satellite moves in a circular orbit of 4.8 x 106 m above the surface of the earth. What is the orbital speed of the satellite
A 1,500kg satellite is placed in an orbit 8,000km above the surface of the Earth. How long does it take the satellite to go around the Earth
A rubber balloon is rubbed against a wool sweater and acquired a charge of -1.6 μC. How many electrons were transferred from the sweater to the balloon?
A student weighing 800 N crouches on a scale and suddenly springs vertically upward.His roommate notices that the scale reads 900 N, With what acceleration does he leaves the scale
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