Consider the gallon of water from the scenario in the previous question. If we use a 600 square centimeter magnifying glass to focus the sun's light on the water, how long will it take to raise the water to boiling? Ignore any heat lost by the water during the process. Some useful values: 4. The radiant power of the sun at noon on the Earth's equator is about 1,370 watts per square meter. That is 1,370 joules of energy every second over every square meter of the Earth near the equator.

Horizons: Exploring the Universe (MindTap Course List)
14th Edition
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Chapter16: Earth And Moon: Bases For Comparative Planetology
Section: Chapter Questions
Problem 1DQ
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weight of water helps with 4

Substituting the value of m
3.79 kg,
c =4180 J · kg¯¹. °C−¹, T¡ = 21.1 °C and Tƒ
Ti
= 100 °C in
equation (1), we get,
Q= =
(3.79 kg)(4180 J · kg¯¹ · °℃¯¹)(100 °C – 21.1 °C)
or, Q = 1.25 × 106 J
Therefore, heat needed to raise the temperature of a
gallon of water from 21.1°C to 100 °C is 1.25 × 106 J.
Transcribed Image Text:Substituting the value of m 3.79 kg, c =4180 J · kg¯¹. °C−¹, T¡ = 21.1 °C and Tƒ Ti = 100 °C in equation (1), we get, Q= = (3.79 kg)(4180 J · kg¯¹ · °℃¯¹)(100 °C – 21.1 °C) or, Q = 1.25 × 106 J Therefore, heat needed to raise the temperature of a gallon of water from 21.1°C to 100 °C is 1.25 × 106 J.
4. Consider the gallon of water from the scenario in the previous question. If we use a 600 square
centimeter magnifying glass to focus the sun's light on the water, how long will it take to raise the
water to boiling? Ignore any heat lost by the water during the process.
Some useful values:
The radiant power of the sun at noon on the Earth's equator is about 1,370 watts per square meter.
That is 1,370 joules of energy every second over every square meter of the Earth near the equator.
Transcribed Image Text:4. Consider the gallon of water from the scenario in the previous question. If we use a 600 square centimeter magnifying glass to focus the sun's light on the water, how long will it take to raise the water to boiling? Ignore any heat lost by the water during the process. Some useful values: The radiant power of the sun at noon on the Earth's equator is about 1,370 watts per square meter. That is 1,370 joules of energy every second over every square meter of the Earth near the equator.
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