Which of the following is a unit of energy:

a. watt b. ft—lb/sec c. newton/sec. d. horsepower e. joule


e

Physics & Space Science

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We expect to directly detect gravitational waves in the near future

Indicate whether the statement is true or false

Physics & Space Science

What are the two possible explanations for not seeing something glowing brightly along every line-of-sight?

I) The universe is infinite in size and infinitely old, but dust absorbs starlight from far away stars. II) The universe has a finite number of stars. III) The universe is changing in some way as to prevent us from seeing an infinite number of stars. A) I and III B) II and III C) I and II

Physics & Space Science

The component in CFCs that is responsible for destroying ozone is

a. chlorine. b. oxygen. c. carbon. d. none of the above.

Physics & Space Science

A marathon is 26mi and 385yd long. Estimate how many strides would be required to run a marathon. Assume a reasonable value for the average number of feet/stride

A) 4.5 × 106 strides B) 4.5 × 104 strides C) 4.5 × 105 strides D) 4.5 × 103 strides

Physics & Space Science