Which of the following is not involved in the formation of a rainbow?
a. interference b. dispersion
c. internal reflection d. refraction
a
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The sweep technique used in SETI programs is also known as a
A) targeted search B) intentional search C) sky survey D) random search
If the sum total mass of reactants in a nuclear reaction is greater than that of product particles, then which of the following statements best describes the conditions of the reaction?
a. reaction is exothermic b. reaction is endothermic c. atomic number of each reactant must be greater than 40 d. atomic number of each reactant must be less than 80
Assume that the reference frame is moving with the person indicated in each of the following situations. In which case is the reference frame noninertial?
a. The person is walking at a constant speed along a straight, horizontal sidewalk. b. The person is walking at a constant speed along a straight sidewalk that is inclined downward at a slight unchanging angle. c. The person is riding an elevator upward at constant speed. d. The person is skydiving and is freefalling not yet having opened her parachute.
A rad is that amount of radiation that:
a. is also known as a rem. b. deposits 10–2 J of energy into 1 kg of absorbing material. c. deposits 8.76 × 10^–3 J of energy into 1 kg of air. d. produces 2.08 × 10^9 ion pairs per cm3 in air under standard conditions.