Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in opposite directions,
A) the wires pull toward each other.
B) one wire is lifted slightly while the other wire is forced downward against the table's surface.
C) both wires are lifted slightly.
D) the wires push away from each other.
D
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Mare Imbrium is the result of a planetesimal of 275 km across striking the lunar surface 4 billion years ago
a. True b. False Indicate whether the statement is true or false
An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s "burn.". The rocket moves at 160 m/s after the burn. What average force is experienced by the rocket during the burn?
a. 0.80 × 10^4 N b. 0.75 × 10^4 N c. 0.60 × 10^4 N d. 0.35 × 10^4 N
A uniform rod of length L and mass M is pivoted about one end. Attached to the rod is a mass M at its midpoint and at the end opposite the pivot is another mass M. What is the moment of inertia of this configuration about the pivot?
a. 3ML2 b. 7ML2/12 c. 4ML2/3 d. 19ML2/12
If the distance between two point charges is doubled, the mutual force between them will be changed by what factor?
a. 4 b. 2 c. 1/2 d. 1/4 e. 1