In this figure, a cork attached to a string floats in an inverted jar filled with water. Compare the cork to a helium balloon attached to a car seat. (See the "Physics on Your Own" box on page 164 of your textbook). As the jar shown here is accelerated, you would expect the cork to behave:
a. similar to the balloon in an accelerating car.
b. the opposite of the helium balloon in an accelerating car.
c. in a way that is unrelated to the balloon.
a
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Population II stars I. are primarily found in the disk of the galaxy. II. contain more heavy metals than population I stars. III. are primarily old low mass stars. IV. are located in globular clusters
a. III & IV b. I & II c. II d. IV e. I, II, & III
How many centimeters are there in one kilometer?
a. 100 b. 1,000 c. 10,000 d. 100,000 e. 1×10^6
Power: The heating element of a toaster is a 5.4-m length of nichrome wire of diameter 0.48 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ? ? m. The toaster is designed to operate at a voltage of 120 V. How much power does it draw in normal operation?
A. 370 W B. 360 W C. 380 W D. 400 W E. 410 W
What would be the consequence(s) of more frequent collisions between planets and asteroids?
A) Earth and other planets would have more large craters. B) We would observe more meteor showers. C) We would find more Martian meteorites on Earth. D) A and B E) A and C