An object is submerged in a swimming pool and of course the water exerts a buoyant force on the object. Suppose a thousand gallons of oil is spilled into the pool and now floats above the water
How is the buoyant force on the object changed by the overlying oil?
No change at all as long as the density of the water remains unchanged. After all, the buoyant force depends upon the volume displaced and the DENSITY of the water.
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Mass on a Spring: In a supermarket, you place a 22.3-N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the force constant (spring constant) of the spring of the scale?
A. 650 N/m B. 600 N/m C. 330 N/m D. 820 N/m E. 410 N/m
A ball is dropped from a rooftop of a building and falls for two seconds. The acceleration of gravity is 9.8 m/s2 . The ball is referred to at the two-second time. The acceleration of the ball in m/s2 is
a. 0. b. 4.9. c. 9.8. d. 19.6. e. none of these.
A container is filled with a mixture of helium (light molecules) and oxygen (heavy molecules) gases. A thermometer in the container reads 22°C. Which gas molecules have the greater average speed?
A) It is the same for both of the gases because the temperatures are the same. B) The oxygen molecules do because they are diatomic. C) The oxygen molecules do because they are more massive. D) The helium molecules do because they are less massive. E) The helium molecules do because they are monatomic.
The signature of a planet is largest in transit measurements when the planet and star are lined up along the line of sight to the telescope
Indicate whether the statement is true or false