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.
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
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
The remaining core of a planetary nebula is called a(n) ______________
Fill in the blank(s) with correct word