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Mary weighs 505 N. She walks down a flight of stairs to a level 5.50 m below her starting point. What is the change in Mary’s potential energy?
A 72.0-kg man is riding an escalatorin a shopping mall. What is the work done on the manby each of the gravitational force
A harmonic wave on a string with mass per unit length 0.065 kg/m and a tension of 71.0 N has an amplitude of 6.9 cm. find the average power propagated along the string
You are 1.7m m tall and stand 3.5m m from a plane mirror that extends vertically upward from the floor. What is the minimum height the mirror must have for you to be able to see the top of the table in the mirror
A friend in a spaceship travels past you at a high speed. He tellsyou that his ship is 22 m long and thatthe identical ship you are sitting in is 19 m long. According to your observations, how long is your ship
an infinitely long line of charge has a linear charge density of 3.00times10-12 . a proton is at distance 17.0 cm from
A capacitor has parallel plates of area 12 cm2 separated by 4.5mm . The space between the plates is filled with polystyrene, Find the induced surface-charge density on the surface of the dielectric
A stone takes 0.28s to travel past a window 2.2m tall. From what height above top of the window did the stone fall?
A projectile os fored at 35 degrees above the horizontal. Its initial speed is equal to 100 m/s. What is the maximum height reached by the projectile
The magnetic force per meter on a wire is measured to be only 21% of its maximum possible value
A source emits sound uniformly in all directions. A radialline is drawn from this source. On this line, determine the radialpositions of two points, 1.28 m apart, such that the intensitylevel at one point is 2.46 dB greater than that at the other.
A 950-kg satellite orbits the Earth at a constant altitude of 105-km. What is the change in the system's kinetic energy
A bat flying in a cave emits a sound and receives its echo 0.37s later. How far away is the cave wall? (Hint: The sound has to travel to the wall and then back again. Use 340 m/s for the speed of sound.)
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