The term terminator refers to the boundary line dividing day and night on the surface of a planet or moon. In this experiment, it is the line between the bright and dark side of the Moon. State the phase of the Moon when the terminator is the (a) sunrise line, (b) sunset line


(a) waxing phase; (b) waning phase.

Physics & Space Science

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At which lunar phase(s) are tides most pronounced (e.g., the highest high tides)?

A) first quarter B) new Moon C) full Moon D) both new and full Moons E) both first and third quarters

Physics & Space Science

An engineer uses a river to cool his electrical plant which heats water with a boiler operating at What’s the maximal performance (in terms of efficiency) theoretically possible for this electrical plant?

A. 64% B. 36% C. 27% D. 73%

Physics & Space Science

A long, straight wire carrying a current is placed along the y-axis

If the direction of the current is in the +y direction, what is the direction of the magnetic field due to this wire as you view it in such a way that the current is coming directly toward you? A) clockwise, around the x-axis B) counterclockwise, around the x-axis C) counterclockwise, around the z-axis D) counterclockwise, around the y-axis E) clockwise, around the y-axis

Physics & Space Science

A bulldozer attempts to drag a log weighing 500 N along the rough horizontal ground. The cable attached to the log makes an angle of 30° above the ground. The coefficient of static friction between the log and the ground is 0

50, and the coefficient of kinetic friction is 0.35. What minimum tension is required in the cable in order for the log to begin to slide?

Physics & Space Science