Where on Earth is the impact crater that scientists believe caused the extinction of dinosaurs?
a. Flagstaff, Arizona
b. Chicxulub, Mexico
c. Aricebo, Puerto Rico
d. Mauna Kea, Hawaii
e. Antarctica
b
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The proper abbreviation for ‘seconds' is __________
Fill in the blank(s) with correct word
The pressure in a constant-volume gas thermometer extrapolates to zero at what temperature?
a. 0°C b. 0 K c. 0°F d. 0 Pa
A proton (mass = 1.67 × 10^?27 kg, charge = 1.60 × 10^?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 50 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB ? VA
a. +20 V b. ?20 V c. ?27 V d. +27 V e. ?40 V
Earth is a noninertial reference system:
a. only because it rotates. b. only because it revolves. c. only because of the movement of the Milky Way Galaxy. d. only because of the motion of the Moon. e. because of all the various ways it moves, including rotation, revolution, and the movement of the Galaxy.