Physics, 15.07.2020 02:01 catsRlife3451
1) A system of particles is known to have a total kinetic energy of zero. What can you say about the total momentum of the system?
2) A bowling ball and a Ping-Pong ball are rolling toward you with the same momentum. If you exert the same force to stop each one, which takes a longer time to bring to rest?
a) the bowling ball
b) same time for both
c) the ping-pong ball
d) impossible to say
3) A cannon sits on a stationary railroad flatcar with a total mass of 1000 kg. When a 10-kgcannonball is fired to the left at a speed of 50 m/s, what is the recoil speed of the flatcar?
Answers: 3
Physics, 22.06.2019 04:40
How is the gravitational force related to the distance between two objects?
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4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?
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Physics, 22.06.2019 13:10
The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 Γ 1013 rad/s. the mass of a nickel atom is 9.75 Γ 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 Γ 10-34 j β’ s, , 1 ev = 1.60 Γ 10-19 j)
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Physics, 22.06.2019 14:40
What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4Γ106m.
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1) A system of particles is known to have a total kinetic energy of zero. What can you say about the...
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