When two solid spheres of the same material and same radius r are in contact, the magnitude of the gravitational force each exerts on the other is directly proportional to
A. r.
B. r2.
C. r3.
D. r4.
E. r6.
Answer: D
You might also like to view...
Deuterium and lithium-7 are part of the 4.5% normal matter
a. True b. False Indicate whether the statement is true or false
How does the fraction of oxygen in Earth's atmosphere today compare to what it was 3 billion years ago?
a. It has significantly declined. b. It has significantly increased. c. It kept increasing up to 2 billion years ago but has been declining ever since. d. It hasn't changed.
Consider star C, a measly 3000 K star, and star D, an impressive 9000 K star. Assuming they are about the same size, how do their luminosities compare?
A: Star D is 3 times as luminous as star C. B: Star D is 4 times as luminous as star C. C: Star D is 9 times as luminous as star C. D: Star D is 16 times as luminous as star C. E: Star D is 81 times as luminous as star C.
What is the frequency, in hertz, of a sound wave (v = 340 m/s) with a wavelength of 68 m?
a. 5 Hz b. 23120 Hz c. 340 Hz d. 0.2 Hz