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Standing on a balcony, you throw your keys to a friend standing on the floor below. One second after you release the keys, they have an instantaneous velocity of 13.9 m/s, directed 45o below the horizontal. Find what initial velocity did you give them?
The air inside a bicycle tire pump has 221 joules of work done on it as 60.1 joules of heat is conducted away from it
The Voyager I spacecraft moves through interstellar space with a speed of 7400m/s. Assuming that the 5.6-m long antenna on the spacecraft is at right angles to the magnetic field, find the induced emf between its ends
calculate the heat absorbed by 19.5 g of tef6 when its temperature changes from 500 k to 750 k at
A disk of mass M is free to rotate about a fixed horizontal axis. What is the downward acceleration of the mass
suppose that while lying on a beach near the equator watching the sun set over a calm ocean you start a stopwatch just
It eventually launches horizontally off of the table and takes the path of a projectile until it hits the ground 40 centimeters from the edge of the table.
A person with mass m1 = 59.0 kg stands at the left end of a uniform beam with mass m2 = 93.0 kg and a length L = 2.9 m. Another person with mass m3 = 68.0 kg stands on the far right end of the beam and holds a medicine ball with mass m4 = 13.0 kg
The secondary colors, cyan, magenta, and yellow, can each be obtained by subtracting a color from white light. Which primary color is subtracted in each case
Two particles of equal but unknown charge are held 45 cm apart. If their electrostatic repulsion is 2.2 X 10^5 Newtons, what is the magnitude of their charge
An astronaut living at a space station is in a constant state of free fall- the only force exerted on her and on the space station is the gravitational force due to the Earth. How can an astronaut determine her mass while on an extended stay in sp..
A gun isfired vertically into a 1.10 kg block of wood at rest directlyabove it. If the bullet has a mass of 21.0 g and a speed of 245m/s, how high will the block rise into the air
question1the pulley of an ideal atwoods machine is given an upward acceleration a. find out an acceleration of each
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