A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?

a. 3.2 rad/s
b. 26 rad/s
c. 52 rad/s
d. 81 rad/s


c

Physics & Space Science

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The Universe contains _____________________

a. 22.7% baryonic, 4.5% WIMPs, 72.8% dark energy b. 22.7% normal, 4.5% non-Baryonic, 72.8% dark energy c. 22.7% non-Baryonic, 4.5% normal, 72.8% dark energy d. 22.7% dark energy, 4.5% baryonic, 72.8% non-baryonic

Physics & Space Science

If sunlight were green instead of white, the most comfortable color to wear on a hot day would be

A) magenta. B) yellow. C) green. D) blue. E) violet.

Physics & Space Science

When comparing two gases at the same temperature, the molecules of the gas with the smaller molecular weight have the higher rms speed

Indicate whether the statement is true or false

Physics & Space Science

Which statement best describes the greenhouse effect? a. infrared radiation escapes into space

b. ultraviolet radiation enters a planet's atmosphere producing a green haze c. visible radiation is trapped by the atmosphere. d. infrared radiation is trapped by the atmosphere. e. oxygen escapes from the atmosphere.

Physics & Space Science