The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
a. True
b. False
Indicate whether the statement is true or false
False
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Suppose that Mars had a higher surface temperature. How would its spectrum be different?
A. The peak in the infrared would be at shorter wavelength. B. It would reflect more of the Sun's red light C. The peak in the infrared would be at longer wavelength. D. It would reflect more of the Sun's blue light.
The objective lens of a microscope
A. Focuses diverging rays from the object into a real image B. Focuses parallel rays from the object into a real image C. Focuses diverging rays from the object into a virtual image D. Focuses parallel rays from the object into a virtual image
Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston. If the gas temperature is 298 K, and the pressure is 1.01 × 10^6 N/m2, what is the volume? (R = 8.31 J/mol•K)
a. 9.81 × 10^-3 m3 c. 17.3 × 10^-3 m3 b. 4.90 × 10^-3 m3 d. 8.31 × 10^-3 m3
A 15-?F capacitor is charged to 40 V and then connected across an initially uncharged 25-?F capacitor. What is the final potential difference across the 25-?F capacitor?
a. 12 V b. 18 V c. 15 V d. 21 V e. 24 V