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A 0.145 kilogram baseball pitched at 39.0 m/s is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s. If the contact time between ball and bat is 1.00 x 10-3 second, find the average force between the ball and bat during contact.
A charge of +4µC is placed at one corner of an equilateral triangle and a charge of -2µC at another corner. What is the electric potential at the corner of the triangle without a charge
The angle of refraction of a ray of light traveling through a piece of fused glass quartz is 29°. Find the angle of incidence
The length of the B string on a certain guitar is 62.0 cm. It vibrates at a fundamental frequency of 246.0 Hz. what should the tension be when the string is in tune
A boy on the edge of a vertical cliff 20 m high throws a stonehorizontally outward with a speed of 20 m/s. It strikes the grounfat what horizontal distance from the foot of the Cliff
You want to design a helium-filled balloon that will lift a whole payload of 1350 kg. Find what volume of helium is required to just barely lift this payload
A projectile is set 8000m horizontally from the edge of a bluff that drops 100m down from the level of projectile. Find the angle it makes when it hits the ground
A window in a house is rectangular, with height 49 cm and width 29 cm. What is the force on the window
a battleship simultaneously fires two shells toward two identical enemy ships. one shell hits ship a which is close by
A spaceship moving away from Earth at 0.67 c fires a particle beam toward Earth, with speed 0.74 c relative to the ship. At what speed does Earth receive the particles? At what speed does Earth receive the particles?
How far away can a human eye distinguish two car headlights 1.8 m apart? Consider only diffraction effects and assume an eye pupil diameter of 5.5 mm and a wavelength of 550 nm.
A muon is a lepton that is a higher-mass (rest mass 105 MeV/c^2) sibling to the electron. How many muons survive to reach the surface
A steam power plant has, at the turbine entrance, saturated vapor with a pressure of 40 bar. The turbine exit is at 50 degrees C. The pump entrance is at 50 degrees C as well, and its exit is saturated liquid at 40 bar. The pump and turbine are is..
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