Estimate Comet Tempel 1's diameter, using the scale bar in the photo.

What will be an ideal response?


About 5 km, though its unusual shape could lead to answers between 4 and 8 km.

Physics & Space Science

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Which planet is about half the size of Earth?

A. Venus B. Mercury C. Earth D. Mars

Physics & Space Science

The rate of heat flow by conduction through a slab does NOT depend upon the:

A. temperature difference between opposite faces of the slab B. thermal conductivity of the slab C. slab thickness D. cross-sectional area of the slab E. specific heat of the slab

Physics & Space Science

Water vapor in the atmosphere can cause a greenhouse effect.

Answer the following statement true (T) or false (F)

Physics & Space Science

A hunter fires a bullet from a horizontally—held rifle while simultaneously dropping another bullet from the side of the rifle. The bullet to hit the ground first is

A) the dropped one. B) the fired one. C) both hit at the same time

Physics & Space Science