Why does the Moon seem to change shape? A.
As the Moon revolves
around Earth, different parts are lit by the Sun.

B.
The viewpoint from Earth of the illuminated side of the Moon changes.

C.
Earth's shadow is blocking light from the Sun.

D.
The way the Moon produces light changes, so we see different shapes.

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Could someone . i have tried to solve myself but my calculation is off