Where is the sun located relative to a planet's orbit about it?
a. at the center of the orbit, which is a circle
b. at the center of the orbit, which is an ellipse
c. at one focus of the ellipse which forms the orbit
d. none of the above
C
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A ball thrown upwards reaches a maximum height and then comes back down to the original level. At the peak of the motion the velocity and acceleration are both zero
Indicate whether the statement is true or false
If a dense 20.0-kg object is falling in air at half its terminal velocity, what is the drag force on the object at this moment?
a. 24.5 N b. 49.0 N c. 69.3 N d. 98.0 N e. 139 N
Which of the five major divisions of chemistry deals exclusively with carbon compounds?
a. Physical chemistry b. Inorganic chemistry c. Analytical chemistry d. Organic chemistry e. Biochemistry
Which statement best describes Phobos and Deimos? a. small satellites, irregular in shape and heavily cratered b. large satellites, spherical in shape with smooth surfaces c. small satellites, spherical in shape with smooth surface
d. one large and one small satellite, irregular in shape with lava flows e. large satellites, irregular in shape and heavily cratered