What is in the box shown below? 
A. Positive charge
B. Negative charge
C. Zero charge
D. One cannot determine the charge’s sign from this diagram.
C. Zero charge
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A company that produces pulsed gas heaters claims their efficiency is approximately 90%. If an engine operates between 250°C and 25°C, what is its maximum thermodynamic efficiency?
a. 83% b. 65% c. 43% d. 90% e. 56%
Escape speed from Earth is about
1) 8 km/s. 2) 11.2 km/s. 3) more than 11.2 km/s. Interestingly, if a stone released at rest at the far edge of the solar system drops to Earth by virtue of only Earth gravity, it will strike Earth's surface with a speed of about 4) 8 m/s. 5) 10 km/s. 6) 11.2 km/s. 7) more than 11.2 km/s.
The acceleration of an object depends only on the net applied force
Indicate whether the statement is true or false
____________________ is a measure of the amount of energy due to the motion of the particles in a gas, liquid, or solid
Fill in the blank(s) with correct word