Exam 1: Egee 102 Penn State 2025
Questions and Answers
True or False? Over the recent decades, the annual energy use was growing faster
in the industrialized countries compared to developing economies. - ANSWER-
False
What is reflected by the GDP (gross domestic product) per capita? - ANSWER-
Value of goods an average person can purchase per year
Complete the sentence. One BTU of energy is enough to _______. - ANSWER-
Heat one pound of water by one degree Fahrenheit.
Complete the sentence. One calorie is defined as the amount of energy that is
required to raise the temperature of _____. - ANSWER-1 g of water by 1ºC.
What type of energy is provided by gasoline fuel? - ANSWER-Chemical
Which one of the following is a unit of power? - ANSWER-Watt
True or False? Energy cannot be created or destroyed, but can only be converted
from one form to another. - ANSWER-True
True or False? A BTU has more energy than a calorie. - ANSWER-True
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, What type of energy is possessed by a football thrown by a quarterback? -
ANSWER-Mechanical kinetic, Mechanical potential, and thermal
Two cars of the same mass are moving the same direction at speeds 40 and 80
miles per hour respectively. What is the difference in kinetic energy between these
two cars? - ANSWER-4 times
An electric bulb rated at 60 W is used for 12 hours. How much energy is burned? -
ANSWER-720 Wh (multiply 60 W by 12 hours)
A 100 watt incandescent light bulb is operated for 120 hours, and a 15 watt
fluorescent light bulb is operated for the same time. At the local price of electricity
of 10 cents per kWh, what cost savings are achieved for that period of time by
using the fluorescent bulb? - ANSWER-$1.02
(Energy=Power x duration, bulb 1: 100W x 120h = 12,000Wh=12kWh;
bulb 2: 15W x 120h = 1,800 Wh=1.8kWh.
The energy savings is the difference (12-1.8)kWh=10.2kWh;
at the rate of 10 cents per kWh this amounts to $1.02)
What is true about energy conversion devices according to the energy conservation
principle (1st Law of Thermodynamics)? - ANSWER-Total Energy Input = Useful
Energy Output + Energy Dissipated to Surroundings
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
Questions and Answers
True or False? Over the recent decades, the annual energy use was growing faster
in the industrialized countries compared to developing economies. - ANSWER-
False
What is reflected by the GDP (gross domestic product) per capita? - ANSWER-
Value of goods an average person can purchase per year
Complete the sentence. One BTU of energy is enough to _______. - ANSWER-
Heat one pound of water by one degree Fahrenheit.
Complete the sentence. One calorie is defined as the amount of energy that is
required to raise the temperature of _____. - ANSWER-1 g of water by 1ºC.
What type of energy is provided by gasoline fuel? - ANSWER-Chemical
Which one of the following is a unit of power? - ANSWER-Watt
True or False? Energy cannot be created or destroyed, but can only be converted
from one form to another. - ANSWER-True
True or False? A BTU has more energy than a calorie. - ANSWER-True
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, What type of energy is possessed by a football thrown by a quarterback? -
ANSWER-Mechanical kinetic, Mechanical potential, and thermal
Two cars of the same mass are moving the same direction at speeds 40 and 80
miles per hour respectively. What is the difference in kinetic energy between these
two cars? - ANSWER-4 times
An electric bulb rated at 60 W is used for 12 hours. How much energy is burned? -
ANSWER-720 Wh (multiply 60 W by 12 hours)
A 100 watt incandescent light bulb is operated for 120 hours, and a 15 watt
fluorescent light bulb is operated for the same time. At the local price of electricity
of 10 cents per kWh, what cost savings are achieved for that period of time by
using the fluorescent bulb? - ANSWER-$1.02
(Energy=Power x duration, bulb 1: 100W x 120h = 12,000Wh=12kWh;
bulb 2: 15W x 120h = 1,800 Wh=1.8kWh.
The energy savings is the difference (12-1.8)kWh=10.2kWh;
at the rate of 10 cents per kWh this amounts to $1.02)
What is true about energy conversion devices according to the energy conservation
principle (1st Law of Thermodynamics)? - ANSWER-Total Energy Input = Useful
Energy Output + Energy Dissipated to Surroundings
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
