The ____ of an object is a measure of the amount of matter it contains. The ____ is a measure of the gravitational force on an object

a. weight; mass
b. mass; weight
c. energy; force
d. force; energy
e. momentum; energy


b

Physics & Space Science

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An object moves at a constant velocity of 12 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?

a. It can be any value from 0 to 24 m/s. b. 6 m/s c. 12 m/s d. More information is needed.

Physics & Space Science

Which potatoes when peeled produce the most peelings?

A) 10 kg of large potatoes B) 10 kg of small potatoes C) both the same

Physics & Space Science

The isotope 64Zn has a nuclear radius of 4.8 × 10^?15 m. Approximately what is the nuclear radius of the isotope 27Al?

a. 2.0 × 10^?15 m b. 2.7 × 10^?15 m c. 3.6 × 10^?15 m d. 4.0 × 10^?15 m

Physics & Space Science

A straight wire lies along the y-axis initially carrying a current of 10 A in the positive y-direction. The current decreases and reverses to 10 A in the negative y-direction, the change in current happening at a uniform rate. In the 1st quadrant a square conducting coil has 2 sides parallel to the y-axis and the other 2 sides parallel to the x-axis. The side of the coil nearest and parallel to

the straight wire is at a distance equal to the length of one of the sides of the square. As the current is going from 10 A in one direction to 10 A in the other, in which direction is the induced current in this side of the square coil nearest to the straight wire? a. It is in the positive y-direction. b. It is in the negative y-direction. c. At first it is in the positive y-direction, but after the current passes through zero, it is in the negative y-direction. d. At first it is in the negative y-direction but after the current passes through zero, it is in the positive y-direction.

Physics & Space Science