Problem 5 and 6, I ask in chegg third times about this two question, they gave m
ID: 778791 • Letter: P
Question
Problem 5 and 6, I ask in chegg third times about this two question, they gave me the different answer, please make sure that your answer is correct and write it clearly, I would be grateful to you, tahnk you!
5. Two identical potatoes, one at 100°C and the other at 90°C, are placed on a table. The tem- perature of the room is 15°C, and the potatoes begin to cool, which of the following statements is NOT truef? (a) As the potatoes cool, the 90°C potato will always be cooler than the 100°C potato. (b) At every point in time, the total amount of heat lost by both potatoes will be the same. (c) As the potatoes cool, the 100°C potato will always lose heat faster than the 90°C potato. (d) At no point in time will either potato reach a temperature below 15°C. 6. Which of the following is a true statement about Earth's greenhouse effect? (a) Greenhouse gases are transparent to light radiated by the sun, but absorb infrared rays radiated by the Earth. (b) Greenhouse gases absorb sunlight faster than the Earth can radiate it away. (c) Greenhouse gases are transparent to light radiated by the sun, but absorb sunlight that is reflected by the Earth. (d) Greenhouse gases create holes in the ozone layer, meaning more sunlight can pass through and heat the Earth.Explanation / Answer
5.(b) is not true.
Explaination :
dT/dt = k(TtTs)
rate of temperature change will be different as well as heat lost at evey point of time will be different.
yes 100°c potato will lose heat faster and temp of each potato can't be less than 15°c at equilibrium.
6. (a) greenhouse gases are transparent to light radiated by the sun ,but absorb infrared rays radiated by the earth.