Which statements describe dark matter? Select two options.
It is invisible.
It is...
Physics, 05.05.2020 13:31, hilarydodard5138
Which statements describe dark matter? Select two options.
It is invisible.
It is the same as dark energy.
It is well understood by scientists.
It does not emit electromagnetic radiation.
It can be observed by shifts in red and blue light.
Answers: 3
Physics, 21.06.2019 21:20, KillerSteamcar
The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race
Answers: 1
Physics, 22.06.2019 14:00, 6224968918
Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
Answers: 1
Physics, 22.06.2019 20:10, JayLiz1737
On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)
Answers: 1
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