Wood does not have magnetic properties because it contains no
A) iron or other metals.
B) magnetic domains.
C) moving electrons.
D) none of the above
Answer: B
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A scuba diver has his lungs filled to half capacity (3 liters) when 10 m below the surface. If the diver holds his breath while quietly rising to the surface, what will the volume of the lungs be (in liters) at the surface? Assume the temperature is the same at all depths. (The density of water is 1.0 × 10^3 kg/m3.)
a. 5.9 b. 4.5 c. 6.4 d. 3.9 e. 3.1
When a gas undergoes an isothermal process, there is
A) no work done by (or on) the gas. B) no heat added to the gas. C) no change in the volume of the gas. D) no change in the temperature of the gas. E) no change in the pressure of the gas.
Significant Figures: In the sum A + B + C, A is accurate to 5 decimal places, B is accurate to 2 decimal places, and C is accurate to 3 decimal places. What is the correct number of decimal places in the sum?
A. 2 B. 3 C. 4 D. 5 E. 10
When a ferromagnetic material is placed in an external magnetic field, the net magnetic field of its magnetic domains becomes
A) smaller. B) zero. C) larger.