If light from a distant star passes close to a massive body, the light beam will:
A) bend towards the star due to gravity.
B) continue moving in a straight line.
C) change color to a shorter wavelength.
D) slow down.
E) accelerate due to gravity.
A
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The ecliptic can be defined as
a. the plane that is perpendicular to the Earth's axis of rotation. b. the projection of the Earth's equator onto the sky. c. the path traced out by the Moon in our sky in one month against the background stars. d. the path traced out by the Sun in our sky over one year against the background stars.
Leaving a hot oven door open in a closed room on a cool day
A) decreases room temperature. B) increases room temperature. C) doesn't affect room temperature.
A point charge (?5.0 ?C) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 ?C) is placed on the x axis at x = ?4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 ?C) placed on the y axis at y = 3.0 cm?
a. 90 N b. 45 N c. 54 N d. 72 N e. 36 N
Imagine that you could put three electrons into isolation in a box. Initially, electrons A and B have kinetic energy E0 and electron C has kinetic energy 2E0. After isolation from observation for a short time, you examine the electrons again and find that one electron has energy 2E0 and two electrons have energy E0
Assume for this problem's sake that the electrons can transfer energy to one another but only in increments of E0. Assume also that all electrons are exactly the same. What is the probability that the higher energy electron is electron C?