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At a carnival, you can try to ring a bell by striking a target with a 7.99-kg hammer. In response, a 0.391-kg metal piece is sent upward toward the bell, which is 5.42 m above. Suppose that 26.9 percent of the hammer's kinetic energy is used to do the work of sending the metal piece upward. How fast must the hammer be moving when it strikes the target so that the bell just barely rings?
What is the smallest thickness of a soap film (n = 1.33) that would appear black if illuminated with 450 -nm light? suppose there is air on both sides of the soap film.
A 3.2 mass attached to a spring with a spring constant of 114 is oscillating in a vat of oil, which damps the oscillations. If the damping constant of the oil is 10kg/s, how long would it take the amplitude of the oscillations to decrease to 1.0% ..
A 747 airliner reaches its takeoff speed of 187 mi/h in 31.4s. What is the magnitude of its average acceleration.
A 1040 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 2.0 m apart that causes the car to bounce on its spring suspension. The car bounces with maximum amplitude as its speed is 21 km/h. The car now stop..
A 2.0-kg object is attached to a spring (k=55.6 N/m) that hangs vertically from the ceiling. obtain the magnitude of the maximum acceleration of the object
A cart of mass M1 = 5.00 kg and initial speed = 4.00 m/s collides head on with a second cart of mass M2 = 3.00 kg at rest. find the speed of M2 after the collision
Heather and Jerry are standing on a bridge 60m above a river. How much time elapses between the first splash and the second splash
An element in its solid phase forms a cubic crystal lattice with mass density 7950 kg/m^3. What is the element's atomic mass number
A plane leaves Seattle, flies 85.0mi{rm mi} at 22.0°^circ north of east, and then changes direction to 54.0°^circ south of east. After flying at 121mi{rm mi} in this new direction, the pilot must make an emergency landing on a field. The Seat..
A 3.0 kg particle with velocity v = (5.0 m/s) - (6.0 m/s) is at x = 3.0 m, y = 8.0 m. It is pulled by a 7.0 N force in the negative x direction. What torque about the origin acts on the particle
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
Two small plastic spheres, one charged to 18nC and the other to ? 18nC , are connected by a 30-mm-long insulating rod. What is the maximum possible torque on the dipole
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