A "gamma" ray is
A. an electron.
B. a helium nucleus.
C. two electrons bound to two neutrons.
D. electromagnetic radiation.
Answer: D
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What is the sum of 1123 and 10.3 written with the correct number of significant figures?
A) 1.13 × 103 B) 1133.3000 C) 1.1 × 103 D) 1133.3 E) 1133
A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?
What will be an ideal response?
According to general relativity, it is impossible to distinguish between an accelerated frame of reference and ________.
What will be an ideal response?
The substances that are formed by a chemical reaction are called the
a. products. b. reactants. c. chemicals. d. precipitates.