A particle is in the first excited state of a one-dimensional box of length 1.0 m. What is the minimum value of its momentum (in kg × m/s)?
a. 3.3 × 10^-34
b. 6.6 × 10^-34
c. 9.9 × 10^-34
d. 13 × 10^-34
e. 22 × 10^-34
B
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If the wavelength of light is 400 nm in a substance where the speed of light is what is the wavelength of this light in air?
A. 313 nm B. 400 nm C. 511 nm D. 635 nm E. 940 nm
A machinist turns on the power on to a grinding wheel at time t = 0 s. The wheel accelerates uniformly from rest for 10 s and reaches the operating angular speed of The wheel is run at that angular velocity for 30 s, and then power is shut off
The wheel slows down uniformly at until the wheel stops. What is the total number of revolutions made by the wheel in this situation? A) 510 B) 280 C) 320 D) 470 E) 750
In naming compounds, the prefix is used to
A) indicate the level of toxicity. B) categorize the compound. C) indicate the relative number of atoms. D) indicate the relative number of molecules.
Because the earth's orbit is slightly elliptical, the earth actually gets closer to the sun during part of the year. When the earth is closer to the sun its orbital speed is
A) less than when the earth is farthest away from the sun. B) the same as when the earth is farthest away from the sun. C) greater than when the earth is farthest away from the sun.