A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2 . What is its angular speed at the instant it goes through an angular displacement of 10 rad?
a. 0.025 rad/s
c. 0.46 rad/s
b. 0.11 rad/s
d. 0.71 rad/s
D
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The H-R diagram is a diagram plotting the stars according to their
A. luminosity and temperature. B. spectral type and temperature. C. mass and diameter. D. brightness and luminosity class. E. apparent brightness and temperature.
Compared to infrared radiation, does ultraviolet radiation have longer or shorter wavelengths? Does ultraviolet radiation have higher or lower energy per photon?
What will be an ideal response?
In the Milky Way galaxy, gas and dust are found:
A) in molecular clouds. B) everywhere. C) in neutral hydrogen clouds. D) in dark nebulae. E) in emission nebulae.
A proton is located at the point (x = 1.0 nm, y = 0.0 nm) and an electron is located at the point Find the magnitude of the electrostatic force that each one exerts on the other. (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.6 × 10-19 C)
A) 1.4 × 10-11 N B) 5.3 × 10-18 N C) 5.3 × 108 N D) 5.9 × 10-15 N