What is it called when matter changes directly from a solid to a gas?

What is the only "power" unit of measurement in light energy?

List two general reasons why scientists are likely to collaborate

some blind cave salamanders have eyes. how might this be evidence that cave salamanders evolved from sighted ancestors'

True or false the molecular formula for ibuprofen is the same as the empirical formula

What will occur when the trough of Wave A overlaps the trough of Wave B? A. Destructive interference will occur, causing the new wave to have more energy than Wave A or Wave B. B.

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)

Your boss at the Cut-Rate Cuckoo Clock Company wants to save money on materials. You are asked to reduce the balance wheel, which is cylindrical, dimensions to one-third their original values.