A coulomb of charge passing through a 6-V battery acquires
A) 6 joules.
B) 6 amperes.
C) 6 ohms.
D) 6 watts.
E) 6 newtons.
Answer: A
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An object 2.0 cm in height is placed at the center of curvature C in front of a concave mirror. What is the height of its image?
A) -0.50 cm B) -1.0 cm C) -1.5 cm D) -2.0 cm E) -6 cm
Which of these are physical quantities?
a. time b. energy c. seconds d. kilometers e. volume
Your first airless world! (The life-support belt seems somewhat out of adjustment, so you constantly feel as if you're going to explode)
Because of the lack of atmosphere, you must be very careful not to look at the Sun so that you will not be blinded by the ultraviolet and X-ray radiation; however, you are able to determine that the Sun has about the same angular size that you are used to on Earth. Also, because there is no air, you notice that the shadows are completely pitch-dark and there are no sounds at all. Although this world is clearly lifeless, you are surprised to find footprints and car tracks etched in the surface.
In any elastic head-on collision, the relative speed of the two objects after the collision has the same magnitude (but opposite direction) as before the collision, no matter what the masses are
Indicate whether the statement is true or false