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A 144 kg park bench made of iron sits in the sun and its temperature increases from 25 degrees celsius to 35 degrees celsius. How many kilojoules of energy does the bench absorb?
Dan is gliding on his skateboard at 4 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 6 m/s (as measured by an observer on the ground). Dan's mass is 50 kg and the skateboard's mass is 7 kg. How fast is Dan going..
The position of a particle as it moves along a y axis is given by y = (2.0 cm) sin (?t/4), What is the instantaneous acceleration of the particle at t = 0, 1.0, and 2.0 s
A wave travels on a string at 60m/s. A second string of 20 percent greater linear density has the same tension applied as in the first string. What will be the resulting wave speed in the second string?
helium atoms emit light at several wavelengths. light from a helium lamp illuminates a diffraction grating and is
Suppose an ideal battery does 80 Joule of work in moving 7 C of charge between its terminals. Determine what the emf of this battery
An archer wishes to shoot an arrow at a target at eye level a distance of 56.5 m away. what angle should the arrow make with the horizontal
A 1000 kg car carrying four 76 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with utmost amplitude when its speed is 18 km/h. The car now ..
You need to determine the density of a ceramic statue. If you suspend it from a spring scale, the scale reads 28.4N. What is the density
A lawn mower in the form of a thin-walled, hollow cylinder withmass M is pulled horizontally with a constant horizontal force F applied by a handle attached to the axle, find the acceleration and friction force
in reaching her destination a backpacker walks with an average velocity of 1.34 ms due west. this average velocity
A cart loaded with bricks has atotal mass of 23.8 kg and is pulled at constant speed by a rope. The rope isinclined at 21.6 ? abovethe horizontal and the cart moves 15.1 m on a horizontal floor.
You brake your Porsche with constant acceleration from a velocity of 23.6 m/s to 12.5 m/s over a distance of 105 m. How much time elapsed during this interval
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