What is the surface of a heat exchanger?

What will be an ideal response?


The surface of a heat exchanger is the area separating the hot fluid from the
cold fluid.

Physics & Space Science

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The Palomar reflecting telescope has a parabolic mirror with an 80-m focal length. What is the magnification achieved when an eyepiece of focal length 2.5 cm is used?

a. 800 b. 1,100 c. 1,600 d. 3,200 e. 2,000

Physics & Space Science

Why didn't the Viking landers find organic molecules in the soil on Mars?

A) The Martian soil contains perchlorate, which destroyed the organic molecules when heated during the experiments. B) There are no organic molecules on Mars because they were carried away by the solar wind. C) The Viking landers were not designed to detect organic molecules. D) Organic molecules exist too deep below the surface of Mars to be detected.

Physics & Space Science

Impulse: A block of mass m = 5.6 kg, moving on a frictionless surface with a velocity of vi = 6.5 m/s to the right, collides with a block of mass M at rest, as shown in the figure. After the collision, the 5.6-kg block recoils with a velocity of vf = 0.70 m/s to the left. If the blocks are in contact for 0.20 s, what is the magnitude of the average force on the 5.6-kg block, while the two blocks are in contact?

A. 202 N B. 192 N C. 182 N D. 34 N E. 162 N

Physics & Space Science

A 3.50-kg block is pulled along a moving conveyor belt at a constant speed of 0.500 m/s relative to a stationary observer while the belt moves at a constant speed of 0.200 m/s in the opposite direction. If the coefficient of kinetic friction is 0.400, the magnitude of the mechanical energy dissipated, in J, caused by the force of friction on the block in 8.00 s is

A. 5.6. B. 22.0. C. 32.9. D. 54.8. E. 76.8.

Physics & Space Science