Answer:
The correct prediction will be:
The temperature of the surface of the ball bearing when rubbed over glass will be the least.
The incorrect prediction:
The tennis ball over the linoleum floor will have no friction, as the temperatures will not change.
<u>Answer:</u>
"The Sun's diameter is about five times that of Earth" is not true about the sun.
<u>Explanation:</u>
The Sun at the pivotal of the solar system is a star and covers 99.86% of the total mass of the system. Approximately 73% mass of the sun is due to hydrogen gas while nearly 25% mass due to helium and for the remaining mass small amount of heavier elements like carbon, oxygen, neon and iron are responsible.
The diameter of the sun is 864,000 miles or 1.39 million km or 109 times of the Earth while mass is 330,000 times of the Earth's mass. Sun is a almost perfect sphere of hot plasma with internal convective motion responsible for production of a magnetic field through a dynamo process. And the most important source of energy on Earth for life.
Answer:
B. The larger force causes more acceleration than the smaller.
Explanation:
For example, let me use a child and a grown up. The child represents the smaller force while the grown up represents the larger force. If they are pushing the same object of different sides, obviously the side with the grown up will push and move to the side of the child because it is stronger.
A I believe it would be true
Answer:
The first harmonics are the fundamental, the first overtone, and the second overtone,
For a string fixed at both ends you have:
N-A-N F/2
N-A-N-A-N F
N-A-N-A-N-A-N 3 F/2 each harmonic increases by F/2
Where N are the anti-nodes and A the antinodes
N-A-N-A-N represents 1 wavelength for string fixed at both ends
So 1 wavelength is 64 cm
280 m/s = F * .64 m and F = 437.5 Hz (second harmonic)
First harmonic = F/2 = 218.75 / sec
Third harmonic = 3 F / 2 = 656.25 /sec
