Lobsters live on the bottom of the ocean. Compared with the density of seawater, the density of a lobster is
A) greater.
B) the same.
C) less.
Answer: A
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Our Sun was born in a spiral arm
a. True b. False Indicate whether the statement is true or false
If a block is set sliding on a huge imaginary frictionless plane in contact with Earth's surface, it will NOT sustain a constant speed because
A) a component of gravitational force parallel to the plane soon acts on it. B) gravity gets weaker as distance increases. C) it is not free from the shackles of Earth's gravity. D) of its inertia.
As global warming raises the moisture content in our atmosphere, storms will
A) become less numerous and less severe B) disappear all together C) become less numerous but more severe D) become more numerous and severe
A 6.6-?C charge is placed at the origin and a second charge is placed on the x-axis at x = 0.1 m. If the resulting force on the second charge is 5.7 N in the positive x-direction, what is the value of its charge?
a. 1.0 ?C b. 1.0 nC c. –1.0 ?C d. –1.0 nC e. 0 ?C