Which of these is stated properly?
a. "The temperature of liquid nitrogen is 77 Kelvin.".
b. "The temperature of liquid nitrogen is 77 Kelvins.".
c. "The temperature of liquid nitrogen is 77 degrees Kelvin.".
d. "The temperature of liquid nitrogen is 77 Kelvin degrees.".
B
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A 6.0-kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.40, at what rate does the box accelerate down the slope?
A) 3.1 m/s2 B) 3.4 m/s2 C) 3.7 m/s2 D) 4.1 m/s2
Our home galaxy is called the ______________
Fill in the blank(s) with correct word
A rod (length = 80 cm) with a rectangular cross section (1.5 mm × 2.0 mm) has a resistance of 0.20 W. What is the resistivity of the material used to make the rod?
a. 6.0 × 10^-7 W × m b. 3.8 × 10^-7 W × m c. 7.5 × 10^-7 W × m d. 3.0 × 10^-7 W × m e. 4.8 × 10^-7 W × m
What is the total energy stored in the group of capacitors shown if the charge on the 30-?F capacitor is 0.90 mC?
a.
29 mJ
b.
61 mJ
c.
21 mJ
d.
66 mJ
e.
32 mJ