This is a change in both form and nature of substance in which bonds are broken.

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 222J of energy to the room? Joules

Name five lifestyle activities

What is playing catch? (in terms of the force of the air interacting with ball)

The average kinetic energy of particles of matter is called

A large jet flying overhead is low enough so that a man on the ground can hear its engines. The man sees the jet before he hears the engines because

What conclusion can be drawn from the statement that an element has high electron affinity, high electronegativity, and a high ionization energy? A) The element is most likely from Group 1A or 2A and in period 1 or 2.

When a cyclist rides past you on the street, this is an example of

Why are galaxies visible

I hockey puck slides across an ice rink more easily than it does across a rough concrete surface why is this

Sodium-22 Sodium-25 # of protons # of neutrons # of electrons