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While anchored in the middle of a lake, you count exactly three waves hitting your boat every 14.0 s. You raise anchor and start motoring slowly in the same direction the waves are going. When traveling at 1.50 m/s, you notice that exactly two waves are hitting the boat from behind every 14.0 s. What is the speed of the waves on the lake? (in m/s)
Suppose 3.0 moles of a monatomic gas are maintained at a constant volume. By how much does the temperature increase if 800.0 J of heat is put into the gas
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.50 m above the pool. What is her velocity when her feet hit the water
A solid, uniform, spherical boulder (I=2/5 MR^2) starts from rest and rolls down a hill. The top 1/4 of the hill is rough enough to cause the boulder to roll without slipping, How high is the hill
A skier of mass 68.4 kg glides down a hill of slope 26.5 degree at constant speed. If she travels a distance 35.0m down the hill, what is (a) the work done by friction and (b) the coefficient of friction between her skis and the slope?
A rocket is fired straight up and accelerates upward at 12 m/s2 for 18 seconds. The rocket then runs out of fuel and coasts still going up. Ignore any air resistance effects on the rocket and use -9.8 m/s2 for the local acceleration due to gravity..
Consider a skydiver who has stepped from a helicopter and is falling through air, before she reaches terminal speed and long before she opens her parachute. How does her speed change
A 16.0?m length of wire consists of 7.0m of copper followed by 9.0m of aluminum, both of diameter 1.2mm. What is the voltage across the copper part
a closed Gaussian surface in the shape of a cube of edge length 2.30 m. What is the net charge contained by the cube
Two masses of 4.00 kg each, connected by a string, slide down a ramp making an angle of 45° with the horizontal. The coefficient of kinetic friction between m1 and the ramp is 0.33. The coefficient of kinetic friction between m2 and the ramp is 0...
An electric fan is running on HIGH. After fan has been running of 13.2 minutes, the LOW button is pushed. The fan slows down to 98 rad/sec in 1.83 seconds. What was the initial angular speed of the fan
An organ pipe is 2.0 m long. Assume the pipe is cylindrical withone closed and one open end. what is the wavelength of the 2nd harmonic?
q1. a boat crosses a river of width 115 m in which the current has a uniform speed of 1.39 ms. the pilot maintains a
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