Possible ways that sea level could lower include a decrease in
A) worldwide temperatures and an increase in the rate of seafloor spreading.
B) worldwide temperatures and a decrease in the rate of seafloor spreading.
C) tectonic activity and an increase in worldwide temperatures.
D) the rate of seafloor spreading and an increase in worldwide temperatures.
Answer: B
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An alpha particle is:
a. any positively charged nucleus. c. a neutral helium atom. b. an X-ray. d. None of these choices.
Thermal Expansion: The coefficient of linear expansion of copper is 17 × 10-6 K-1 and that of steel is 12 × 10-6 K-1. At 12°C a steel rod has a diameter of 2.540 cm and a copper pipe has a diameter of 2.536 cm. Which one of the following quantities is closest to the temperature to which the copper pipe must be heated in order for the unheated steel rod to fit snugly in the copper pipe?
A. 53°C B. 81°C C. 93°C D. 105°C E. 143°C
If a current of 2.4 A is flowing in a cylindrical wire of diameter 2.0 mm, what is the average current density in this wire?
A) 7.6 × 105 A/m2 B) 5.2 × 10-6 A/m2 C) 1.9 × 105 A/m2 D) 3.6 × 105 A/m2 E) 21 × 10-6 A/m2
In expressions like ?v and ?t, ? stands for _________
Fill in the blank(s) with correct word