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A professional golfer is examining a video of a practice swing. The high-speed footage shows that his club is in contact with the ball (which was initially at rest on the tee) for only 0.471 milliseconds, and the radar gun clocks the speed of the ball as 131 mph after it comes off the club. The golf ball has a mass of 45.9 grams. What is the magnitude of the impulse imparted to the ball by the club? What is the magnitude of the average force of contact between the club and the ball?
The magnetic field component of the electromagnetic wave is 15.0 uT. What is the magnetic energy density of the wave
A 3700-lb automobile (m = 1600 kg) starts from rest on a level road and gains a speed of 45 mi/h (= 72 km/h) in 33 s. What is the average net power delivered to the car during the 33-s interval
A supertrain of proper length 97 m travels at a speed of 0.91c as it passes through a tunnel having proper length 50 m. As seen by a trackside observer, is the train ever completely within the tunnel?
A skier slides horizontally along the snow for a distance of 21 m before coming to rest. how fast was the skier going
When a 0.20-kg block is suspended from a vertically hanging spring, it stretches the spring from its unstrained 0.005 m. find the total mechanical energy of the system at any instant
In a science fiction movie, a 100 g base ball travelling with a speed of 60 m/s and an electron travelling at a speed of 1.2 x 10^8 m/s are approaching each other for a head-on collision
A 65 kg high jumper starts his push-off phase with his center of mass .45 m above groung and velocity of 0 m/s. How much work did the mat do on the high jumper
A person who weighs 715 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. estimate the area of contact between each tire and the ground
What is the velocity of the plank relative to the surface of ice.
A uniform plank of length 6m and weight 211N rests horizontally on two supports, with 1.1 m of the plank hanging over right support. To what distance x can a person who weighs 442N walk on the overhanging part of the plank before it just begins to..
The thickness of the bubble is 115nm and the bubble is illuminated by white light at normal incidencewhat colors(wavelengths) are transmitted throug the bubble
Bill is flying an airplane with air speed 30.0 m/s. going south. Mike is on the ground and sees the plane traveling 25.0 m/s, 15 degrees east of south. What is the component of the wind's velocity to the north
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