One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900°C; exhaust temperature = 430°C. 7 × 109 cal of fuel produces 1.4 × 1010 J of work in one hour

What is the power output, in hp, of this engine?


5213 hp

Physics & Space Science

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Temperature Scales: Express -40°C in °F.

A. -72°F B. -54°F C. -40°F D. 4.4°F

Physics & Space Science

Charge in an Electric Field: A small object with a 5.0-?C charge is accelerating horizontally on a friction-free surface at 0.0050 m/s2 due only to an electric field. If the object has a mass of 2.0 g, what is the magnitude of the electric field?

A. 2.0 N/C B. 4.0 N/C C. 0.0020 N/C D. 0.0040 N/C E. 1.0 N/C

Physics & Space Science

Earth's mantle is

a. metallic. b. very dense gas. c. solid. d. liquid.

Physics & Space Science

For uniform circular motion, the velocity and acceleration vectors are perpendicular to each other at every point in the path

Indicate whether the statement is true or false

Physics & Space Science