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A lion tamer cracks a whip in the air. Assume the whip has a uniform linear density of 0.40 kg/m. The wave the tamer creates in the whip has an amplitude of 0.086 m, a wavelength of 0.071 m, and a speed of 97 m/s. How much power does the wave transmit? The answer in W.
An electron starts from rest 65.3centimeter from a fixed point charge with Q = -0.132uC. Calculate how fast will the electron be moving when it is very far away
What average force is necessary to bring a 49.9-kg sled from rest to a speed of 3.1 m/s in a period of 19.9s? Assume frictionless ice. ___ N in the direction of the sled's motion
A counterweight of mass m = 3.80 kg is attached to a light cord that is wound around a pulley, What is the net torque on the system about the axle of the pulley
the sun emits electromagnetic waves including light equally in all directions. the intensity of the waves at the
When four people with a combined mass of 305 kg sit down in a 2.0 103-kg car, The four people get out of the car and bounce it up and down. What is the frequency of the car's vibration
You can determine the index of refraction of a substance by determining its critical angle. What would the critical angle be for this substance in air
Consider a piece of an n-type semiconductor 15 cm long. 0.7 cm wide, and 1.5 mm (hick. If we apply a 0.35 V voltage across the length, we find that the material conducts a current of 15 mA. If we then put it in a magnetic Held of 1.2 Tesla paralle..
Using a block of transparent, unknown material, What is the index of refraction of this material
A 0.19 kg meterstick has a 0.17 kg mass at its 40 cm mark and a 0.45 kg mass at the 85 cm mark. Where should the fulcrum be so the meterstick is balanced
A bird is initially flying horizontally east at 21.1 m/s, but one second later it has changed direction therefore that it is flying horizontally and 7 north of east, at the same speed. Find the magnitude and direction of its acceleration vector
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
A skier of mass 71 kg is pulled up a slopeby a motor-driven cable. What power must a motor have to perform this task
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