Answer the following statement(s) true (T) or false (F)
1. A railroad car collides with a similar car at rest. The cars lock together. Such a process must convert a significant fraction of the originally moving car’s kinetic energy to thermal energy.
2. If you rub your hands together, they get warmer (try it!). Rubbing therefore heats your hands
3. The heat energy released by a 1-kg bottle of water as its temperature decreases by 1°C could (if we could convert it to gravitational potential energy) lift that bottle hundreds of meters into the air.
1. TRUE
2. FALSE
3. TRUE
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Why couldn't electrons bind to nuclei when the nuclei first formed?
A) electrons exert the strong force on the nuclei and repel it B) universe was much too hot C) universe was much too cold D) electrons exert the weak force on the nuclei and repel it E) electrons have negative charge and repel the nuclei
If the wavelength of sound is increased by a factor of 3, what happens to its speed and frequency?
1.Its speed increases by a factor of 3, and so does its frequency. 2.Its frequency increases by a factor of 3, but the speed stays the same. 3.Its frequency decreases by a factor of 3, but its speed stays the same. 4.Its speed decreases by a factor of 3, and so does its frequency.
A standing wave is likely produced when
A) two waves overlap. B) a wave reflects upon itself. C) the speed of the wave is zero or near zero. D) the amplitude of a wave exceeds its wavelength.
Gamma Rays are a type of electromagnetic radiation
Indicate whether the statement is true or false