When people get into a small boat it settles lower in the water and
a. the buoyant force increases as a result of more water being displaced
b. the net force on the boat again becomes zero
c. the pressure on the bottom of the boat becomes greater because it is deeper in the water
d. all of the above
D
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Which of the following is considered by biologists to be a likely place where life might have first arisen on Earth?
A) on land surfaces that got moderately heavy rainfall B) in hot water near undersea volcanoes C) deep in Earth's core D) on meteorites that landed on Earth
Wave interference occurs in
A) transverse waves. B) longitudinal waves. C) both of the above D) none of the above
A race track is constructed such that two arcs of radius 80 m at A and 40 m at B are joined by two stretches of straight tracks as in the figure. In a particular trial run, a driver traveled at a constant speed of 50 m/s for one complete lap. In this case, the ratio of the centripetal acceleration at A to that at B is
The average distance between Earth and the Sun is called a light-year
Indicate whether the statement is true or false