The magnetic field at a distance of 2 cm from a long straight current-carrying wire is 4 ?T. What is the magnetic field at a distance of 1 cm from this wire?
A) 2 ?T
B) 4 ?T
C) 6 ?T
D) 8 ?T
E) 10 ?T
D
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If an ideal gas does positive work on its surroundings, we may assume, with regard to the gas
a. temperature increases. b. volume increases. c. pressure increases. d. internal energy decreases.
A horse pulls a 350-kg sled at constant speed along an icy road for a distance of 500 m. If the coefficient of kinetic friction between the sled and the road is 0.450, and the angle between the harness and the sled is 25°, what is the mechanical energy lost due to friction?
a. –9.8E+5 J b. –6.4E+5 J c. –1.3E+3 J d. –7.4E+3 J
Arrange from smallest to largest: the BTU, the joule, and the calorie
a. BTU, J, cal b. J, cal, BTU c. cal, BTU, J d. J, BTU, cal
The remaining core of a planetary nebula is called a(n) ______________
Fill in the blank(s) with correct word