6-нұсқа

Which of the following is NOT a centrifugal fan?

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Which of the following is NOT a centrifugal fan?

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What is the apparent consequence of the temperature difference between two systems in thermal contact?

• Absolute temperature

• Energy transfer

• Thermal Equilibrium

Two spheres are made from the same material and the ratio of their radius is 2:1. If these spheres are at same temperature, what is the ratio of heat radiation energy emitted per second will be?

• 1: 4

• 4: 1

• 3: 4

• 4:3

Which of the following is NOT used in the transportation of fluid?

• Valve

• Fans

• Pumps

• Compressors

Where the center of mass of a circle lies?

• At its centre

• Anywhere on its radius

• Anywhere on its circumference

• Anywhere on its diameter

Consider two identical bodies, one at 1000 K and the other at 1500 K. The body at 1000 K will emit more radiation in the shorter wavelength region.

• True

• False

Which of the following is NOT a centrifugal fan?

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Which statement below is true regarding radiation?

• Radiation travels in medium or without medium.

• Radiation travels in medium but sometimes without medium.

• Radiation travels without any medium.

• Radiation travels only in medium.

Consider two identical bodies, one at 1000 K and the other at 1500 K. The body at 1000 K will emit more radiation in the shorter wavelength region.

• True

• False