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A car initially traveling at 23.6 m/s undergoes a constant negative acceleration of magnitude 1.70 m/s squared after its brakes are applied.
1. How many revolutions does each tire makebefore the car comes to a stop, assuming the car does not skid and the tires have a radii of .330m? ___________ rev
2. What is the angular speed of the wheels when the car has traveled half the total distance? ______rad/s
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 680m to be the other plate. Assume the surface area of the cloud to be the same as the area of a square that ..
If I hit a trampoline with a velocity of 38.8 m/s at 53.4 degrees above the horizontal, and I leave the trampoline at an angle of 36 degrees from the horizontal at a velocity of 40 m/s and am in contact with the trampoline for 0.5 seconds.
a 0.223 kg ball is thrown straight up from 1.81 m above the ground. its initial vertical speed is 8.40 ms. a short time
A block of silver, mass ms = 2.05 kg, is heated in a furnace to temperature Ts, but remains solid. It is now dropped on a block of ice, mass mi = 550 g and temperature Ti = 0o C. The combination reaches equilibrium at temperature Tf = 35.4 o C. Find ..
A spherical balloon has a radius of 6.95 and is filled with helium. The density of helium is0.179, Determine the largest mass of cargo the balloon can lift
the displacement of a wave traveling in the negative y-direction is dyt 5.00cm sin 6.50 y 60.0 t where y is in m
The density of ice is 920 kg/m3, and that of sea wateris 1030 kg/m3. What fraction of the total volume of an iceberg is exposed
The wave function y(x, t) for a certain standing wave on a string fixed at both ends is given by y(x, t) = (0.05 m) sin (1.8 m-1x) cos (400 s-1t). What is the shortest possible length of the string
Andy and Brad are lifting a 100 kg box to their apartment window using massless ropes. The ropes are tied to the same point on the box, Find the tensions in each rope.
The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base.
A siren has a frequency of 875 Hz when it and an observer are both at rest. The observer then starts to move and finds that the frequency he hears is 1251 Hz. What is the speed of the observer
A home run is hit in such a way that the baseball just clears a wall 10 m high, located 124 m from home plate, Find the time it takes the ball to reach the wall
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