The buoyant force on an object is:
a. the same for all floating objects.
b. equal to a constant that depends on the fluid times the weight of fluid that the object displaces.
c. inversely proportional to the weight of fluid displaced by the floating object.
d. equal to the weight of fluid that the object displaces.
e. a fictitious force.
d
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Which produces a brighter image? Choose the best answer
a. a small-diameter telescope b. a large-diameter telescope c. A very small light collector d. None of the other choices are correct.
A river 100 m wide flows due south at 1 m/s. A boat that travels 1 m/s relative to the water is pointed due east as it crosses from the west bank. The boat reaches the east bank
A) due east of its starting point. B) 100 m farther south. C) 141 m farther south. D) none of the above
A car traveling 60 km/h accelerates at the rate of 4.0 m/s2. How much time is required for the car to reach a speed of 90 km/h?
What will be an ideal response?
What is the work done on the gas as it expands from pressure P1 and volume V1 to pressure P2 and volume V2 along the indicated straight line?
a.
(P1 ? P2)(V1 ? V2)/2
b.
(P1 + P2)(V1 ? V2)
c.
(P1 + P2)(V1 ? V2)/2
d.
(P1 P2)(V1 + V2)