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Author Question: A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement ... (Read 36 times)

Charlie

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on: Jul 27, 2018
A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy (K) compared to that of the car?
 
  A) The truck has 4 times the K of the car.
  B) All that can be said is that the truck has more K.
  C) The truck has twice the K of the car.
  D) The truck has 8 times the K of the car.
  E) The truck has times the K of the car.

Question 2

The Cambrian Explosion began approximately
 
  A) 2.1 billion years ago
  B) 542 million years ago
  C) 1.2 billion years ago
  D) 65 million years ago


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Tonyam972

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

B


Charlie

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Reply 2 on: Jul 27, 2018
Wow, this really help

juliaf

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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