If the diameter of a wire increases, its resistance
a. increases
b. decreases
c. does not change
d. will increase or decrease depending on the composition
e. will change in a way that can not be determined
B
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Which of the following factors was very important to the decision to classify Pluto as a dwarf planet rather than a "regular" planet?
A) its small size and mass B) its large distance from the Sun C) its composition of ice and rock D) its relatively large moon, Charon
Process of Science: How can we test hypotheses about something that is postulated to exist in the past but that no longer exists today, such as free-flowing water on Mars?
What will be an ideal response?
Ann the Astronaut weighs 65.0 kg. She is space walking outside the space shuttle and pushes a 350.0-kg satellite away from the shuttle at 0.70 m/s. What speed does this give Ann as she moves toward the shuttle?
a. 0.13 m/s b. 3.8 m/s c. 590 m/s d. 290 m/s e. 7.7 m/s
A crate is being pushed with a constant horizontal force, F. Four forces can be identified: 1) F, 2) the gravitational force, 3) the normal force, and 4) the frictional force. Which forces do NO work on the crate?
A. 1 & 4 B. 2 & 3 C. 2 & 3 & 4 D. 1 & 2 & 3