4) Sitting perched on a roof at a height of 7 meters, a shingle with a weight of 0.7 N has a G. P.E. of how many joules?
Formula
Work with Units
Answer with Units

Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?

If steel is more dense that lake water, why can a boat float

In science and physics what is the standard unit of measure for speed?