Which is an indication that a chemical change to a substance has occurred?

A.

It changes shape.

B.

New substances are formed.

C.

Energy is used or given off.

D.

both B and C

Does a mirror work because of refraction

An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.40 m/s on a smooth, slippery surface. the 22.5-g arrow is shot with a speed of 38.5 m/s and passes through the target, which is stopped by the impact.

An aircraft with a mass of 2700kg is moving across the runway at 2m/s. How much Force is involved?

Option 1 - describe the difference between sensation and perception, using fireworks as an example. include the sensory stimuli involved, as well as bottom-up and top-down processing.

Proses terjadinya muai gas pada balon udara

If a person weighs 125 lbs, 8oz., how many mg does s/he weigh

An iron rod is: A:a good conductor of heat and electricity, but not magnetic B: magnetic and a good conductor of heat, but is an insulator of electricity C: magnetic and a good conductor of heat and electricity D: not magnetic and an insulator of

Which stage are there homologous chromosomes lines up down the middle of the cell

Suppose you were bungee jumping from a bridge while blowing a hand-held air horn. How would someone remaining on the bridge hear the pitch of the air horn as time increased? a. The pitch would get progressively lower (i. e., smaller frequency) b.

Area where magma from deep within the mantle melts through the crust