The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed into the page, the direction of the magnetic field at P is closest to the direction of
a.
A
b.
B.
c.
C.
d.
D.
e.
E.
e
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A toy car and a toy truck at rest have a compressed spring in between them. The truck has more mass than the car. The spring is released and the two cars move in opposite directions. Which of the following is true?
A. The magnitude of the truck's momentum is smaller than the car's B. The magnitude of the truck's momentum is larger than the car's C. The magnitude of the truck's momentum is the same as the car's D. It is not possible to tell which has more momentum without knowing the speeds
Explain why the passing star hypothesis was problematic
What will be an ideal response?
If a monochromatic light beam with quantum energy value of 1.6 eV incident upon a photocell where the work function of the target metal is 0.9 eV, what is the maximum kinetic energy of ejected electrons?
a. 2.5 eV b. 1.8 eV c. 0.7 eV d. 3.2 eV e. 1.3 eV
If ice were denser than water, during winter lakes and ponds would
A) completely freeze B) remain liquid C) freeze on the surface but remain liquid beneath D) freeze on the bottom but remain liquid at the surface