When a car goes around a curve at twice the speed, the centripetal force on the car doubles
a. True
b. False
Indicate whether the statement is true or false
False
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Why is Saturn's moon Titan able to retain an atmosphere?
a. Titan only contains light gases which are easy to retain. b. Titan has a large enough mass and is cold enough. c. Titan is biologically active. d. It is so close to Saturn that Saturn's gravity retains Titan's atmosphere.
A capacitor in a single-loop RC circuit is charged to 85% of its final potential difference in 2.4 s. What is the time constant for this circuit?
A. 1.5 s B. 1.3 s C. 1.7 s D. 1.9 s E. 2.9 s
The star Rho Cancri B has about the same mass as our Sun, and the planet discovered around it orbits somewhat closer than Mercury orbits our Sun. The mass of the planet is estimated to be 1.1 times the mass of Jupiter
Why, according to our theory of solar system formation, is it surprising to find a planet the size of Rho Cancri B's planet orbiting at this distance?
What information can be gained from the light curves of eclipsing binaries?
A) their masses B) their distances C) their luminosities D) their temperatures E) their sizes