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An archer pulls her bowstring back 0.420 m by exerting a force that increases uniformly from zero to 220 N.
(a) What is the equivalent spring constant of the bow?
(b) How much work is done in pulling the bow?
A leaf of area 36cm2 and mass 4.8×10?4kg directly faces the Sun on a clear day. The leaf has an emissivity of 0.85 and a specific heat of 0.80 kcal/kg?K. Estimate the rate of rise of the leaf's temperature
A hot-air balloon has a volume of 2741 m3. The density of the air outside the balloon is 1.205 kg/m3. How much weight can the balloon lift
You are piloting a small plane that can maintain an air speed of 136.5 kt (knots, or nautical miles per hour), At that heading, what will be your ground speed
A 1,000-W motor powers a hoist used to lift cars at a service station. If the original motor is replaced with one rated at 2,000 W, how long would it take to complete this task
A 1400 kg car traveling in the positive direction takes 15.0 seconds to slow from 25.0 meters per second to 12.0 meters per second
Monochromatic light falls on two very narrow slits 0.050 apart. Successive fringes on a screen 5.90 away are 6.0 apart near the center of the pattern. A. Determine the wavelength of the light. B. Determine the frequency of the light.
A cylinder is rolling along the ground without the slipping at 7m/s. It comes to a hill and begins going up. Assuming no losses to friction, how high vertically would it go before it stops.
A cylindrical tank with a large diameter is filled with water to a depth D = 0.310 m. What is the rate at which water flows out, in cubic meters per second
A 500g particle has velocity vx = -5.0m/s at t = -2s. Force Fx = (4-t^2)N is exerted on the particle between t = -2s and t = 2s. What is the particle's velocity at t = 2s
A 32.0 µF capacitor is connected to a 45.0 omegacap.gif resistor and a generator whose rms output is 30.0 V at 60.0 Hz. compute The phase angle for the circuit
A 19-kg chandelier is suspended from the ceiling by four vertical steel wires. Each wire has an unloaded length of 5 m, how far do the wires stretch
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wind around the inner core. What is speed of the top point of spool
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