A(n) ________ is a particle of light.
A. photon
B. proton
C. neutron
D. electron
Answer: A
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The peak of Mt. Everest, at 10,900 m, is the highest point above sea level in the world. What is its elevation in miles? (1.00 m = 3.281 ft)
A) 17.6 mi B) 0.630 mi C) 6.77 mi D) 6.20 mi E) 67.1 mi
A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules are at STP. Which statements are true about these molecules? (There could be more than one correct choice.)
A) Both gases have the same average molecular speeds. B) Both gases have the same number of molecules. C) Both gases have the same average kinetic energy per molecule. D) Both gases have the same average momentum per molecule.
A 25-?F capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, with the two positive plates connected and the two negative plates connected. The final potential difference across the 25-?F capacitor is 36 V. What is the value of the capacitance of C?
a. 43 ?F b. 29 ?F c. 22 ?F d. 58 ?F e. 63 ?F
Photography Optics: A 35-mm digital camera using a standard 50.0 mm lens is focused on a 1.80 m tall person who is standing 3.25 m from the lens. You now refocus the camera on a 15.0 cm tall flower that is 75.0 cm from the lens.(a) In refocusing, by how much did you move the lens? Did you move it toward the film or away from it?(b) What is the height of the flower's image on the CCD sensor?
What will be an ideal response?