A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the z axis from z = 0 to z = 3.0m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?
a. 1.0 N
b. 5.0 N
c. 2.0 N
d. 3.6 N
e. 3.0 N
c
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A 2000 kg car is traveling at 20.0 m/s down a long mountain grade of 1.00%. The mountain road is 3.00 km long. The heat generated at the brakes due to friction heats up the brakes. The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg 
What is the increase in the temperature of the brakes?
A. 22.3 
B. 35.1
C. 40.2
D. 45.2
E. 53.6
If distance is speed × time and light takes 8 minutes to travel from the Sun to Earth and over 4 hours to travel from the Sun to the planet Neptune, what is the distance from the Sun to Neptune?
a. 5 AU b. 30 AU c. 30 ly d. 5 ly e. 0.6 ly
Nearsightedness can usually be corrected with
A) converging lenses. B) diverging lenses. C) achromatic lenses. D) cylindrical lenses. E) spherical lenses.
The aurora borealis is an example of atoms and molecules in the atmosphere absorbing photons and exciting the atoms and molecules to emit spectra
a. True b. False Indicate whether the statement is true or false