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In a Little League baseball game, the 145 {\rm g} ball enters the strike zone with a speed of 15.0 {\rm m/s}. The batter hits the ball, and it leaves his bat with a speed of 20.0 {\rm m/s} in exactly the opposite direction.
A stone is thrown horizontally with an initial speed of 7.5m/sfrom the edge of cliff. What is the height of the cliff
A hiker weighing 600N carries a 2.0 kg knapsack up atrail. After 30 minutes, the hiker is 300m higher than thestarting point. how much total work did the hiker do
questionyou are standing 0.75 m from your bathroom mirror in morning. how far away is your image from you? answer is
you are on a boat in a fog and know there are cliffs ahead of you somewhere, but you cannot see them. How far away are the cliffs
in molecules of gaseous sodium chloride the chloride ion has one more electron than proton and the sodium ion has one
An object starting from rest accelerates at 3.00 m/s2for 10.0 s. The object then continues at a constant velocity for 5.00 s. find the objects displacement from the original starting point
Light from a heliom-neon laser (wavelength 632.8 nm) diffracts when incident on a hair of thickness 0.040 mm. What is the angular width of the central diffraction maximum
An 83.6kg person with density 1055 kg/m^3 stands on a scale while completely submerged in water. what does the scale read
If a positron (a positively charged particle with the mass of the electron) and a proton go through the same potential difference, By what factor is the wavelength shorter
A scooter begins at rest at t0 = 0 seconds. The scooter then accelerates and covers a distance d = 526 m, What is the scooters average speed during this period
An object of mass 2 kg increases in speed from 2m/s to 4m/s in 3 sec. Calculate the total work performed on the object during this time interval
A 3.2-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system
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