Vertical air movements are referred to as ______________

Fill in the blank(s) with correct word


air currents

Physics & Space Science

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How do atmospheric windows limit observations made from Earth's surface?

What will be an ideal response?

Physics & Space Science

What is meant by a line spectrum?

a. a spectrum which is straight b. a spectrum made of bright lines in certain places, separated by dark gaps c. a spectrum made by a hot filament stretched into a straight line d. none of the above

Physics & Space Science

If a lamp has resistance of 120 W when it operates at 200 W, what is the applied voltage?

a. 120 V c. 110 V b. 220 V d. 155 V

Physics & Space Science

A heat exchanger is to be designed to heat a flow of molten bismuth from 377°C to 477°C. The heat exchanger consists of a 50-mm-ID tube with surface temperature maintained uniformly at 500°C by an electrical heater. Find the length of the tube and the power required to heat 4 kg/s and 8 kg/s of bismuth.

GIVENS

FIND
The length (L) tube and power required (q) to heat 4 kg/s and 8 kg/s of bismuth
ASSUMPTIONS
Steady state
Uniform and constant surface temperature
Losses from the heater are negligible
SKETCH

PROPERTIES AND CONSTANTS
for Bismuth at the average bulk temperature of 427°C

Physics & Space Science