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A spring has a force constant of 104 N/m. Determine the distance when potential energy is:
a) 50 J,
b) 100 J.
Describe two different energy alternatives to fossil fuels in detail. Discuss how they work, how they compare with fossil fuels, and their relative advantages and disadvantages.
a 50.0-kg block is being pushed up a 15.0deg slope by a force of 300 n which is directed 30.0deg below the slope. the
Shawn and his bike have a total mass of 58.8kg. Shawn rides his bike 1.1km in 12.3 min at a constant velocity. What is Shawn's kinetic energy
a sewing machine needle moves with a rapid vibratory motion rather like shm as it sews a seam. suppose the needle
A 0.20 kg hockey puck slides across a frictionless ice rink at a constant speed of 25 m/s. Ignoring air resistance, what is the work done on the puck while it is sliding
George Bush decides to remodel his house. In the pursuit ofcreating a more harmonious atmosphere between Democrats andRepublicans, he hangs an equal number of blue donkeys, what is the deflection of each object
For the infinite square well problem an electron spends 40% of its time in the n=3 state and 60% of its time in the n=5 state. What is the average energy of the electron
Two 30 kg masses have velocities (in m/s) of vector v 1 = 10 i(hat) - 20 j(hat), Determine the velocity of the center of mass of the system
While surveying a cave, a spelunker follows a passage 190{\rm m} straight west, find the magnitude and direction of the fourth displacement
In a very busy off-campus eatery one chef sends a 249-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.67 m/s. At what speed does it move
it is found experimentally that the electric field in a certain region of earths atmosphere is directed vertically
A 451-? resistor and a 257-mH inductor are connected in series with an ac generator with an rms voltage of 20.0 V and a frequency of 60.0 Hz
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