The strong force is an attractive force between
A. Two protons.
B. Two neutrons.
C. A proton and a neutron.
D. Both A and B.
E. All of A-C.
Answer: E. All of A-C.
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In a design using the aluminum alloy 7075-T6, would it be safe to assume that a part could withstand an infinite number of stress applications that are only 50 % of the yield stress? _________
Fill in the blank(s) with the appropriate word(s).
Two cars are traveling in the same direction and with the same speed along a straight highway. Does either driver hear a different frequency from the other car's horn than they would if the cars were stationary?
A) Yes, they both experience a Doppler shift. B) Only the driver of the front car experiences a Doppler shift. C) Only the driver of the rear car experiences a Doppler shift. D) No, because neither driver experiences a Doppler shift. E) It is impossible to predict.
This diagram shows the period-luminosity relationship. A Cepheid variable with a period of 5 days will have a luminosity of ________ solar luminosities
Fill in the blank(s) with correct word
Which of the following is an almost reversible process?
a. The explosion of hydrogen and oxygen to form water. b. Heat transfer through thick insulation. c. The adiabatic free expansion of a gas. d. A slow isothermal compression of a gas. e. A slow leakage of gas into an empty chamber through a small hole in a membrane.