Buoyancy: As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it if it started above the surface of the water?
A. The buoyant force keeps increasing steadily.
B. The buoyant force remains constant.
C. The buoyant force first increases and then remains constant.
D. The buoyant force steadily decreases.
Answer: C
You might also like to view...
Sulfur has an atomic number of 16. What would be the valence number of this element?
A. One B. Two C. Three D. Four E. Six
The Rankine temperature scale has Fahrenheit degrees and a zero point at absolute zero. What is the Fahrenheit temperature of 62 Rankine?
a. –397.7 °F b. 111.6 °F c. 211.2 °F d. –238.7 °F
A charged particle (mass = 4.0 ?g, charge = 5.0 ?C) moves in a region where the only force on it is magnetic. What is the magnitude of the acceleration of the particle at a point where the speed of the particle is 5.0 km/s, the magnitude of the magnetic field is 8.0 mT, and the angle between the direction of the magnetic field and the velocity of the particle is 60°?
a. 39 km/s2 b. 43 km/s2 c. 48 km/s2 d. 52 km/s2 e. 25 km/s2
A square coil, enclosing an area with sides 3.0 cm long, is wrapped with 2500 turns of wire. A uniform magnetic field perpendicular to its plane is turned on and increases to 0.12 T during an interval of 1.0 s. What average voltage is induced in the coil?
a. 2.5 V c. 1.2 V b. 0.27 V d. 0.12 V