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A stone is dropped into the water from a bridge 144ft above thewater. another astone is thrown vertically down 1s after thefirst is dropped. both stones strike the water at the sametime.
a. what was the initial speed of the second stone?
Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.014 m. Water enters the hydrant through an underground pipe of radius 0.096 m. Find the water speed in each hose
Two 1.50 V batteries -- with their positive terminals in the same direction -- are inserted in series into the barrel of aflashlight. One battery has an internal resistance of 0.240 Ω, the other an internal resistance of0.110 Ω. When the switch is..
An engine with an output of 267.0 W has an efficiency of 39.0 %. It works at 9.00 cycles/s. How much work is done in each cycle? How much heat is rejected each cycle
A photon with wavelength 4 x 10^-15m converts to a muon/antimuon pair. The rest mass energy of the muon and the antimuon is 105.7 Mev. find the combined kinetic energy of the muon and antimuon
A hamster runs in its wheel for 2.7 hours every night. how far does the hamster run in one night
A geologist finds that a Moon rock whose mass is 9.64kg has an apparent mass of 6.25kg when submerged in water. What is the density of the rock
The energy of sunlight hitting the earth is about 1400 W/m^2 (where 1 W= 1 J/s) in mid day. Given that the sun is about 150 million km from the earth, estimate the total output of the sun
charge Q is placed at a vertex of a cube with side length, what is the electric flux through each face of the cube
An airplane is flying in a jet stream that is blowing at 45.0 m/s in a direction 18° south of east, What is the airplane's speed relative to the earth
an airplane has a velocity relative to the air of 196 ms in a westerly direction. if the wind has a speed relative to
Two protons are moving directly toward one another, When they are very far apart, their initial speeds are 2.77 106 m/s. What is the distance of closest approach
If the mass of a sliding block is tripled at the equal time the net on it is tripled, how does the resulting acceleration compare with original acceleration?
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