A rollercoaster car is moving 19.8 m/s on
flat ground when it hits the brakes. It
decelerates at -3.77 m/s2 over the next
45.8 m. How much time does it take?
Ae
A
(Unit = 5)
Watch your minus signs!

Which of the following statements are true of solids? a. the particles do not vibrate. b. the particles are in a fixed location. c. they have strong intermolecular forces between the atoms or molecules. d. the particles have less kinetic energy than those of liquids or gases.

What are similarities and differences between refraction, reflection, diffraction and absorption?

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation