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A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 24 m/s at an angle of 64° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its vertical speed is zero. What is the vertical height between the two climbers?
A sprinter of mass 63.7 kg runs at a constant speed of 10.8 m/s in a straight line. Find the extra force the sprinter must exert on the ground
Two forces, and act at a point. The magnitude of is 9.80, and its direction is an angle 57.0 above the x-axis in the second quadrant. The magnitude of is 6.2, and its direction is an angle 52.7 below the x-axis in third quadrant.
At what height above the surface of the earth does the balloon have a speed of 7-m/s.
Four charges are located in the x-y plane as follows: q@(0,0); 3q @ (a,0); 2q @ (0,a) and -4q @ (a,a). What is the electric force at the center of this distribution
Two capacitors C1 and C2 are connected in parallel to one another, Find the equivalent capacitance of the system if the C1, C2, C3 are respectively 4, 6, 3.6 uF respectively
Water flowing through a 3.0cm -diameter pipe can fill a 200L bathtub in 3.3min. calculate the speed of the water in the pipe
mass-spring system can oscillate with simple harmonic motion because a compressed or stretched spring has which kind of energy.
Two loudspeakers are mounted on a merry-go-round whose radius is 9.01 m. When stationary, What is the beat frequency that is detected by the listener when the merry-go-round is near the position shown
The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in the Figure 16-44 in the textbook. Estimate the net force between a cytosine and a guanine
It takes sound waves of frequency 500 Hz 14.7 ms to make a round trip through a hollow pipe of length 7.5 m filled with helium. What is the speed of sound in helium
A compact disk spins with angular velocity 40.8rad/s. The player is turned off, and 2.10s later the CD has stopped. Find its average angular acceleration
A small steel ball bearing with a mass of 11g is on a short compressed spring. When aimed vertically and suddenly released, spring sends the bearing to a height of 1.21 m. compute the horizontal distance the ball would travel if the same spring we..
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