A straight wire is bent into the shape shown. Determine the net magnetic force on the wire
a.
Zero
b.
IBL in the +z direction
c.
IBL in the ?z direction
d.
1.7 IBL in the +z direction
e.
1.4 IBL in the ?z direction
a
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What explanation does general relativity provide for gravity?
A) Gravity is the result of curved spacetime. B) Gravity is directly proportional to the mass of the attracting body. C) Gravity is inversely proportion to the radius of the body. D) Gravity is the opposite of the electromagnetic force. E) Gravity can affect only massive particles, not massless photons.
How many helium nuclei fuse together when making carbon?
A) 2 B) 3 C) 4 D) varies depending on the reaction E) none of the above
As it orbits the Earth, the Moon appears to move its own diameter (0.5 degrees) eastward every hour against the background stars
Indicate whether the statement is true or false
A bullet is fired straight down from a hovering helicopter. If we neglect air friction, then the speed of the bullet
A. increases at 9.8 m/s each second. B. decreases at 9.8 ft/s during the flight. C. is a constant. D. is zero.