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A quarterback claims that he can throw the football a horizontaldistance of 196.6 m (215 yd). Furthermore,he claims that he can do this by launching the ball at therelatively low angle of 25° above the horizontal. To evaluate his claim, determine the speed with which this quarterback must throw theball. Assume that the ball is launched and caught at the samevertical level and that air resistance can be ignored. Forcomparison, a baseball pitcher who can accurately throw a fastballat 45 m/s (100 mph) would be considered exceptional.1_____________ m/s
A 2 meter wire carrying 1 A of current is at a 90 degree angle to a magnetic field. If the current feels a force of 1 N from the magnetic field, what is the strength of the field
q1. a vessel whose walls are thermally insulated contains 2.00 of water and 0.550 of ice all at a temperature of 0.0.
A toy train rolls around a horizontal 1.70 diameter track. The coefficient of rolling friction is 0.10. What is the magnitude of the train's angular acceleration after it is released? (Found) How long does it take the train to stop if it's releas..
An aircraft with a mass of 996 kg accelerates from 0 to 87 m/s in 6.2 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft when the aircraft launches
The plane of a single circular loop with radius 0.1 m is held so the area vector of the loop is facing the North direction. what is the induced EMF in the loop
two blocks connected by a light cord over a pulley. This apparatus is known as an Atwood's machine. what is the speed of the lighter block
A rocket is fired at a speed of 82.0 m/s from ground level, at an angle of 31.0 ° above the horizontal. The rocket is fired toward an 6.95-m high wall, which is located 18.0 m away.
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
A conical pendulum is formed by attaching a 0.400kg ball to a 1.00m -long string, then allowing the mass to move in a horizontal circle of radius 40.0cm, What is the ball's angular velocity, in rpm
A wheel starts from rest and rotates about its axis with constant angular acceleration. What is the angular velocity when the time t = 6.7 s
One possibility for a low-pollution automobile is for it to use energy stored in a heavy rotating flywheel. What is the angular velocity of the flywheel when it has a full "energy charge"
The ground-state energy of an electron confined along the x-axis is 6.92×10-18 J. What is the approximate length of the region to which the electron is confined
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