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One end of a string, 15 m long, is moved up and down with a simpleharmonic motion at a frequency of 30 Hz. The waves reach theother end of the string in 0.12 s. What is the wavelength ofthe waves on the string?
The maximum speed of a child on a swing is 4.62 m/s. How high above the ground is he at his highest point
a 4.2 m diameter carousel merry-go-round is freely rotating with an angular velocity of w.85 rads. its moment of
A 70.0 kg circus performer slides 4.90m down a pole to the circus floor, starting from rest. What is the kinetic energy of the performer as she reaches the floor if the frictional force on her from the pole (a) is negligible (she will be hurt) and (b..
What would be the percentage change in volume of a cube of aluminum that measured 1.50 on a side when at the ocean surface. how much did the aluminum cube's volume change.
A muon is an elementary particle that can be interpreted as the electron's big brother. Calculate its "Compton Wavelength"
A contact lens is made of plastic with an index of refraction of 1.50. The lens has an outer radius of curvature of +2.0cm and an inner radius of curvature of +2.5cm. What are the focal length and the power of the lens?
a ball is launched at the speed vo at the angle 60 degrees by a basketball player at the height of 2m from the ground.
A cockroach of mass m lies on the rim of a uniform disk of mass 3 m that can rotate freely about its center like a merry-go-round. find the angular velocity of the cockroach-disk system
A plastic bag is filled with hydrogen at atmospheric pressure and 26.0 oC. How large a volume of hydrogen (in m3) is required
A 77 person stands on the uniform ladder 4.0 long, that weighs 100. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only the normal force.
8 equal drops of water are falling through air with a steady velocity of 10 cm/s. then the terminal velocity of the big drop is
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
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