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The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 24.8 m/s at an angle of 60.5° above the ground, what is the "hang time"?
A pion is an unstable particle that has an average lifetime of 2.55 × 10^-8 s. How far does it travel in its lifetime, relative to Earth
Two workers are trying to move a heavy crate. One pushes on the crate with a force , which has a magnitude of 485 newtons and is directed due west.
A capacitor with air between its plates is charged to 70 V and then disconnected from the battery. When a piece of glass is placed between the plates, the voltage across the capacitor drops to 50 V. What is the dielectric constant of this glass?
suppose a wire made from an unknown alloy and having a temperature of 20.0degc carries a current of 0.517 a. at
Determine the magnitude when the force on the wire
A Two balloons of identical volume (radius 11.5 m) are filled with gas. The first with helium, the second with hydrogen (H2) gas. What is the lift created by each one
Four point charges have the same magnitude of 2.2 x10-12 C and are fixed to the corners of a square that is8.3 cm on a side. Three of the charges are positive and one isnegative. Determine the magnitude of the net electric field that exists at the..
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm, what force is exerted by the biceps muscle
A contact lens is made up of a material with index of refraction 1.6. What must the radius of curvature of the outer (convex) surface be in order for the lens to have a focal length of 50 cm
an ideal carnot engine has an efficiency of 25. if it were possible to run it backward as a heat pump what would be its
A sailboat tracking against the wind moves as follows: 3.2 km at 45 degrees east of north, 4.5 km at 50 degrees west of north, What is the speed if it is assumed to be constant
In a typical game of squash, two people hit a soft rubber ball at a wall until they are about to drop due to dehydration and exhaustion.
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