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A 0.6 kg tennis ball, initially moving at a speed of 12m/s is struck by a racket causing it to rebound in the opposite direction at a speed of 18m/s. A high speed movie film determines that the racket and ball are in contact for 0.05 seconds. What is the average net force exerted on the ball by the racket?
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 16 m/s towards the wall at an angle of 30 degrees. How high above the launch point does the ball hit the wall
If the angular velocity is held constant and the radius is doubled, how does the force required change
A large capacitance of 1.20 mF is needed for a certain application. Find the maximum charge that can be stored
Each plate of a parallel-plate capacitor is a square of side 3.89 cm and the plates are separated by 0.539 mm. Find the electric field strength inside the capacitor
the wire in the drawing carries a current of 9.3 a. suppose that a second long straight wire is placed right next to
The temperature dissimilarity between the inside and the outside of a home on a cold winter day is 57.0°F. Express this difference on the Kelvin scale.
You are designing an airport for small planes. One kind of airplane that may use this airfield must reach a speed of at least 27.8m/s (100 km/h), what minimum length must the runway have
In a college parking lot, the number of ordinary cars is larger than the number of sport utility vehicles by 85.7%, Find the number of SUVs in the lot
Future space stations will create an artificial gravity by rotating. What rotation period will provide "normal" gravity
Gravity is the only force acting on a 2 kg mass. The potential energy of the mass increases by 144 J, What is the change in velocity of the mass
What percentage of a photon beam would interact in passing through a 3-mm slice of absorber if the linear attenuation coefficient were 0.15/cm
Two sinusoidal waves of the same frequency travel in the same direction along a string. If ym1 = 5.5 cm, ym2 = 4.2 cm, ?1 = 0, and ?2 = ?/4 rad, what is the amplitude (in cm) of the resultant wave?
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