Mutations are

A) sometimes caused by radioactivity.
B) important in the operation of evolution.
C) Both of the above.
D) None of the above.
E) mostly caused by eating pizza.


C

Physics & Space Science

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If a 20-kg object dropped in air has a terminal speed of 60 m/s, what was its acceleration at 30 m/s?

a. 9.80 m/s2 b. 7.35 m/s2 c. 4.90 m/s2 d. 2.45 m/s2 e. More information is needed to answer this question.

Physics & Space Science

What do we mean by the star-gas-star cycle?

A) It is the continuous recycling of gas in the galactic disk between stars and the interstellar medium. B) It is the idea that stars in close binary systems can exchange gas with one another. C) It is the set of nuclear reactions by which heavy elements are produced in the cores of massive stars. D) It describes the orbits of the stars and interstellar medium around the center of the galaxy.

Physics & Space Science

___________is the process of joining together individual material parts into the final product.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

What is Boyle's law?

a. Gas temperature is a constant. b. Gas pressure is a constant. c. The product of gas volume and gas pressure is a constant. d. The product of gas temperature and gas pressure is a constant. e. The sum of gas temperature and gas pressure is a constant.

Physics & Space Science