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Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.104 kg, initially moves to the right at a speed of 5.20 m/s, while the second block, of mass 0.208 kg, is initially to the left of the first block and moving to the right at 7.30 m/s. Find the final velocities of the blocks, assuming the collision is elastic.
velocity of the 0.104 kg block?
velocity of the 0.208 kg block?
Playing near a road construction site, a child falls over a barrier and down onto a dirt slope that is angled downward at 42° to the horizontal, What is the coefficient of kinetic friction between the child and the slope
An object with a charge of 0.920 µC is placed at the center of a regular tetrahedron with 4 equivalent surfaces. What is the electric flux through one surface of the tetrahedron?
The decay of a fictitious nucleus is accompanied by the emission of a gamma ray with wavelength 2.48*10-2 nm. What is the difference between these two levels
When switch S in the figure is open, the voltmeter V of the battery reads 3.10V . When the switch is closed, the voltmeter reading drops to 2.96V, Find the emf
A baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 30.0°C from 196°C, What was the net radiant power of the baking dish
Helium-Neon laser: "Lambda"= 632.8nm. We can observe the first order maximum at "theta"= 25 degrees. What is the second order maximum angle
A small helium-neon laser emits red visible light with a power of 3.2 mW in a beam with a diameter of 2.5 mm. what is the total energy contained in a 1.00 m length of the beam
how do you know if the far point is the object distance (So) or the image distance (Si) in a problem, Calculate the focal length of Sam's glasses
How might a magician make the Statue of Liberty disappear? Imagine that you are sitting with some spectators on a circular platform that, unknown to all of you, can rotate very slowly. It is evening, and you can see the Statue of Liberty a short dist..
Bubba has a tuning fork with a frequency of 445 Hz. Assuming the speed of sound in his lab is 350. m/s, what length tube is required to find the resonant point of his fork
suppose that we could use the energy released when 5 g of antimatter annihilates 5g of matter to lift a mass 3 km from the Earth's surface. how much mass can we lift? answer in unites of kg.
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. find the magnitude and sign of the excess charge
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