Satellite A has twice the mass of satellite T, and rotates in the same orbit. Which of the following is true?
A) The speed of T is twice the speed of A.
B) The speed of T is one-fourth the speed of A.
C) The speed of T is half the speed of A.
D) The speed of T is three-fourths the speed of A.
E) The speed of T is equal to the speed of A.
E
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A boy on a skate board skates off a horizontal bench at a velocity of 10 m/s. One tenth of a second after he leaves the bench, to two significant figures, the magnitudes of his velocity and acceleration are:
a. 10 m/s; 9.8 m/s2. b. 9.0 m/s; 9.8 m/s2. c. 9.0 m/s; 9.0 m/s2. d. 1.0 m/s; 9.0 m/s2. e. 1.0 m/s; 9.8 m/s2.
____ are star-like objects that contain less than 0.08 solar masses an will never raise their core temperatures high enough that the proton-proton chain can begin. Other minor fusion reactions do occur in these objects. They fall in a gap between the low-mass M dwarf stars and the massive planets in which nuclear fusion never occurs
a. Brown dwarfs b. Herbig-Haro objects c. Bok globules d. T-Tauri star e. Main sequence stars
A magnetic dipole antenna is set up due west of a radio installation that utilizes an electric dipole antenna as a transmitter. What should the orientation of the antenna be used?
A. east-west B. horizontal C. north-south D. Unable to answer given the information. E. vertical
Galileo observed all of the following. Which observation offered direct proof of a planet orbiting the Sun?
A) four moons of Jupiter B) patterns of shadow and sunlight near the dividing line between the light and dark portions of the Moon's face C) phases of Venus D) The Milky Way is composed of many individual stars.