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Agent Arlene devised the following method of measuring the muzzle velocity of a rifle. She fires a bullet into a 4.600-kg wooden block resting on a smooth surface, and attached to a spring of spring constant k= 145.0 N/m. The bullet, whose mass is 7.800g , remains embedded in the wooden block. She measures the maximum distance that the block compresses the spring to be 9.460 cm.
What is the speed v of the bullet?
A uniform ladder 5.0 m long rests against a frictionless, vertical wall with its lower end 3.0 m from the wall. The ladder weighs 180 N. What is the actual frictional force when the man has climbed 1.0 m along the ladder
The electric field midway between two equal but opposite point charges is 939N/, What is the direction of the electric field, Calculate the magnitude of the electric field
A 11.1-kg object hangs in equilibrium at the end of a rope (taken as massless) while a wind pushes the object with a 60.3-N horizontal force. find the rope\'s angle from the vertical
find the potential difference VB - VA, using the blue path.
If we imagine an electron as orbiting the proton, with the orbit of radius 5 x 10 ^-11 m, what is the total energy of the atom
To a first approximation, the velocity of sound in air for different temperatures can be calculated as v=(331+0.6T) m/s, How far away was the lightning
Calculate the minimum required initial velocity for a home run, for baseballs hit at the angles 10 degree, 20 degree, 30 degrees, and 40 degrees from the horizontal
Somewhere between the Earth and the moon, gravity from these two bodies on the space pod would cancel. Is this location nearer the Earth, the moon, or in the middle (having the same distance between) of the earth and the moon.
A 99 kg girl dives off a raft 2.25 square meters floating in a freshwater lake. By how much does the raft rise in cm
What is the total negative charge, in Coulombs, of all the electrons in a small 0.750 g sphere of carbon
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 21 to 59 dB. What is the ratio of the final sound intensity to the original sound intensity?
A uniform disc of mass m and radius R is rigidly mounted coaxially with a lightweight disc of radius r = R/2, to a horizontal shaft, on which combination is free to rotate frictionless. Light strings are wound in opposite directions about the cyli..
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