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A football quarterback throws a pass at an angle of 36°. He releases the pass 3.50 m behind the lineof scrimmage. His receiver left the line of scrimmage 2 s earlier, going straight down-field at a constantspeed of 7.50 m/s. With what speed must the quarterback throw theball so that the pass lands gently in the receiver's hands withoutthe receiver breaking stride? Assume that the ball is released at the same height it is caught and that the receiver is straightdown field from the quarterback at the time of release. (Ignore anyeffects due to air resistance.)
A volltage drop of 0.00039 V is measured across a 1.2 m long piece of copper wire when 10 mA of current passes through it. What is the resistivity of copper
a hiker who weighs 934 n is strolling through the woods and crosses a small horizontal bridge. the bridge is uniform
The earth orbits the sun in an approximately circular orbit of radius 1.496 1011 m (about 93 million miles) in a period of 365 1/4 days. Use these data to determine the mass of the sun
A double slit experiment is performed with sodium(yellow) light of wavelength 589.3nm, Find the separation between slits
q1. a certain groove in phonograph record moves past the needle at 36 cms. if the wiggles in the grove are 0.1 mm apart
a 4 kg box is pushed up a frictionless 30 degree incline with a force of 40n. this 40 n force is parallel to the
A 0.460 kg wood block is firmly attached to a very light horizontal spring (k = 160 N/m) as shown in Fig. 6-40. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before..
Near the surface of the Earth a block of mass M is sliding down an incline with angle thetha = 30degress, what maximum height H will the block reach
two small beads having charges q1 and q2 of the same sign are fixed at the opposite ends of a horizontal insulating rod
Now a peg is placed 4/5 of the way down pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its starting po..
A proton moves .10m along the direction of an electric field of a magnitude 3.0V/m. What is the change in kinetic energy of the proton
Using a simply pulley/rope system, a crewman on an Arctic expedition is trying to lower a 5.52 kg crate to the bottom of a steep ravine of height 23.9 meters. At what speed will the crewman hit the bottom of the ravine
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