Density describes
a. mass per unit volume.
b. length per unit time.
c. volume per liter.
d. weight per mass.
a
You might also like to view...
Magnetic Field of a Long Wire: A long straight wire has a constant current flowing to the right. A rectangular metal loop is situated above the wire, and also has a constant current flowing through it, as shown in the figure. Which one of the following statements is true? 
A. The net magnetic force on the rectangle is upward, and there is also a nonzero torque on the rectangle. B. The net magnetic force on the rectangle is zero, and the net torque on it is zero. C. The net magnetic force on the rectangle is downward, and there is also a nonzero torque on the rectangle. D. The net magnetic force on the rectangle is zero, but there is a nonzero torque on the rectangle. E. The net magnetic force on the rectangle is downward, and the net torque on it is zero.
The accurate determination of star distances by the method of standard candles requires accurate knowledge of the ________ of the standard candle.
A. temperature B. luminosity C. size D. speed
A 5.0-nC point charge is embedded at the center of a nonconducting sphere (radius = 2.0 cm) which has a charge of ?8.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point that is 1.0 cm from the center of the sphere?
a. 1.8 × 10^5 N/C b. 9.0 × 10^4 N/C c. 3.6 × 10^5 N/C d. 2.7 × 10^5 N/C e. 7.2 × 10^5 N/C
Newton's Second Law in 1 Dimension: A 40-kg crate is being lowered with a downward acceleration is 2.0 m/s2 by means of a rope.(a) What is the magnitude of the force exerted by the rope on the crate?(b) What would be the magnitude of the force exerted by the rope if the crate were being raised with an acceleration of 2.0 m/s2?
Fill in the blank(s) with the appropriate word(s).