What branch of science is, matter, energy, motion, forces, time

Why is the nacl extracted with water three times?

What is a non-example of a Proton?

Josie bought a soda and 2 candy bars the soda cost $1.10 her bill was $2.40. how much was her candy bar?

Find density of 25.71g with 2.3*4.01*1.82 cm

A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?

What astronomical equiptment did hypatia use?

Name each activity or observation as either physical or chemical change. 1) Boiling water for pasta 2) Digesting food 3) Soda goes "flat" 4) Stretching a rubber band 5) Grilling a hamburger 6) Adding sugar to tea 7) Adding lemon to tea 8) Mowing the

Ironing a shirt is an example of ... convection conduction radiation condensation

Which compound conducts electricity only in the molten state? A. sodium bromide B. calcium hydroxide C. barium sulfate D. magnesium sulfate

What is going to happen to a balloon filled with helium that is left in a car over night when the temperature drops approximately 20 degrees