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Gayle runs at a speed of 3.20 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of 5.00 m, her brother, who is initially at rest, hops on her back and together they continue down the hill. What is their speed at the bottom of the hill if the total vertical drop is 18.5 m? Gayle's mass is 50.0 kg, the sled has a mass of 5.00 kg and her brother has a mass of 30.0 kg.
A 2.50 g bullet, traveling at a speed of 465 m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 275 g. What is the speed of the bullet/block combination immediately after collision.
A large metal ring has a radius of 0.30 m and a mass (uniformly distributed) of 2.5 kg. The ring hangs from a nail as shown. What is the rotational inertia of this object
Consider a hypothetical universe in which the electron hasspin 3/2 rather than spin 1/2. Draw n enegy level diagram for the n=3 states of hydrogen,neglecting fine structure and hyperfine strucure. Label the states by the appropriate quantum nubers..
q1. what fraction of the power radiated by the sun is intercepted by the planet mercury? the radius of mercury is 2.44
A kangaroo can jump over an object 2.6 m high. Calculate its vertical speed when it leaves the ground
A river is flowing with a constant speed of 2.00 km/h. A swimmer starts at a dock, swims upstream to another dock that is 550 m away, how long does her round trip take
A car spring (lenght (0.2) m) is suspended from the ceillingof a garage . A 200kg mass is suspended from the spring which stretches an extra 0.004m . the spring is stretched slightly ( veryslightly ) further and released assume SHM and determine t..
What is the speed of a wave on a string that has a mass of 9.6 kg and a length of 7.2 m while a 7.0 kg mass is hanging from the end?
Find the frequency in terahertz of visible light with a wavelength of 441 nm in vacuum
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.13 m2, what is the percentage lost by the window
q1. two 53 rm g blocks are held 30 rm cm above a table. one of them is just touching a 50-long spring. the blocks are
When 2.1 mol of oxygen (O2)gas is heated at constant pressure starting at 0°C, how muchenergy must be added to the gas as heat to quadruple its volume? (The molecules rotate but donot oscillate.)
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