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You're listening to a loudspeaker with an initial output of 50 watts, and someone turns it up to 100 watts. Will the music sound more than, less than, or exactly twice as loud as before? This is what I have, but i think its wrong : t will be less than twice because the human ear sensitivity depends on other conditions than intensity.
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. If the U.S. burns 200 million of gallons of gasoline every year, how many billions of lbs of CO2 are emitted every year?
If you hold a 900cm2 square plane mirror 43cm from your eyes and can just see the full length of an 7.7m flagpole behind you, how far are you from the pole
consider a system consisting of 3 charges. a 1 c charge is located at x 0 a 2 c charge is located at x 2 cm and -1 c
A molecule of DNA (deoxyribonucleic acid) is 2.28 µm long, Determine the effective spring constant of the molecule
q1. you are to program a robotic arm on the assembly line to move in a xy-plane. its first displacement is its second
A uniform electric field of magnitude E = 500 N/C makes an angle of ? = 61.0° with a plane surface of area A = 3.80 m2, Find the electric flux through this surface
provide step by step process used to reach solutions.a 5600 kg mass car is taking a turn at 72 ms. if the frictional
A 9.8-kg object oscillates at the end of a vertical spring that has the spring constant of 1.75 104 N/m. The effect of air resistance is represented by the damping coefficient b = 3.00 N•s/m.
A walkway suspended across a hotel lobby is supported at numerous points along its edges by a vertical cable above each point and a vertical column underneath. how much does the point move down
A flight attendant pulls her 63-N flight bag a distance of 277-m along a level airport floor at a constant velocity. The force she exerts is 35N at an angle of 57° above the horizontal. Determine the work completed by the force of friction on flig..
Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 348 kg. how much mass should be dropped overboard
A 55.0 kg crate rests on a level floor at a shipping dock. What horizontal pushing force is required to just start the crate moving
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