Author Question: What is the only form of heat transfer that can operate in a vacuum? A) conduction B) convection ... (Read 89 times)

D2AR0N · **on:** Jul 14, 2018

What is the only form of heat transfer that can operate in a vacuum?

A) conduction B) convection C) radiation D) advection

Question 2

What is the significance of the Tropic of Cancer and the Tropic of Capricorn?

What will be an ideal response?

aham8f · **Reply #1 on:** Jul 14, 2018

Answer to Question 1

C

Answer to Question 2

Because the Earth is tilted 2312 from the perpendicular, on June 21 or 22, the Tropic of Cancer (at 2312 north latitude) is tilted toward the Sun and receives the Sun's rays vertically. This is the first day of summer in the Northern Hemisphere (the first day of winter in the Southern Hemisphere... Similarly, on December 21 or 22, the Tropic of Capricorn (at 2312 south latitude) is tilted toward the Sun and receives the Sun's rays vertically. This is the first day of winter in the Northern Hemisphere (the first day of summer in the Southern Hemisphere).