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Author Question: Air is composed mainly of A) N2 and O2. B) N2 and O3. C) O2. D) CO2 and O3. E) CO2 and ... (Read 22 times)

fox

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on: Jul 29, 2018
Air is composed mainly of
 
  A) N2 and O2.
  B) N2 and O3.
  C) O2.
  D) CO2 and O3.
  E) CO2 and O2.

Question 2

A ball rests in the middle of a cart. When you quickly jerk the cart forward, the ball
 
  A) hits the front of the cart.
  B) hits the back of the cart.
  C) remains in the middle of the cart.
  D) all, depending on how quickly the cart is pulled


millet

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Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

Answer: B


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