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A standing wave is formed in a stretched string that is 3.1 long. What is the wavelength of the first harmonic? What is the wavelength of the second harmonic?
Two ice skaters, with masses of 30.0kg and 65.0kg , are at the center of a 60.0m -diameter circular rink. If the heavier skater reaches the edge in 40.0s , how long does the lighter skater take to reach the edge
Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.017 m. Find the water speed in each hose
A river flows due east at 1.51 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 10.8 m/s due north relative to the water. (a) What is the velocity of the boat as viewed by an observer on the ..
Two blocks of masses m1 = 2.00 kg and m2 = 4.25 kg are each released from rest at a height of y = 5.20 m on a frictionless track, obtain the velocity of each block just before the collision
A particle with a charge of -1.5uC and a mass of 2.5x10-6 kg is released from rest at point A and accelerates toward point B, arriving there with a speed of 42 m/s. The only force acting on the particle is the electric force. (a) Which point is at..
The earth's atmosphere pushes down on the surface of the earth with a force of 14.7 lb for each square inch of the earth's surface. What is the total weight of the earth's atmosphere
A 66 kg rock climber is climbing a so called chimney between two rock slabs, What is her push against the rock
A convex mirror has a focal length of magnitude 6.23 cm. (a) If the image is virtual, what is the object location for which the magnitude of the image distance is one third the magnitude of the object distance? (Enter distance in cm from the front of..
The intake in the figure has cross-sectional area of 0.72 m2 and water flow at 0.49 m/s. What is the pressure difference between inlet and outlet
A thin 320g disk with a diameter of 5.20 cm rotates about an axis through its center with 0.705J of kinetic energy. What is the speed (in m/s) of a point on rim.
Light of wavelength 550nm in air is found to travel at 1.96*10^8 m/s in a certain liquid. Determine the wavelength of the light in the liquid
A weightlifter stands up at constant speed from a squatting position while holding a heavy barbell across his shoulders, Draw a free-body diagram for the weight lifter
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