Question 32 How many kWh are used when a 1750 Watt hair dryer is used for 35.0 minutes? 1021 61250 .. 61.25 1.021

Chemistry In Focus
7th Edition
ISBN:9781337399692
Author:Tro, Nivaldo J.
Publisher:Tro, Nivaldo J.
Chapter9: Energy For Today
Section: Chapter Questions
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please answer all 4 questions , please 

Question 32
How many kWh are used when a 1750 Watt hair dryer is used for 35.0 minutes?
1021
61250
>
61.25
O 1.021
Question 33
A microwave oven is used for 6.21 hours in a week. The microwave oven uses 1150 Watts of
power. If electricity costs $0.1125/kWh, how much did it cost to run the microwave oven for the
week?
$8.03
$0.80
$7.14
$28.92
Question 22
C-14 has a half life of 5730 years. An object contains 12.5% of the C-14 it originally had when it
died. How long ago (in years) did the object die?
17190
O 5730
22920
11460
Question 1
Most of the alternative energies have what advantage
O energy can easily be stored
can be build anywhere
cheap
No CO2 emissions
Transcribed Image Text:Question 32 How many kWh are used when a 1750 Watt hair dryer is used for 35.0 minutes? 1021 61250 > 61.25 O 1.021 Question 33 A microwave oven is used for 6.21 hours in a week. The microwave oven uses 1150 Watts of power. If electricity costs $0.1125/kWh, how much did it cost to run the microwave oven for the week? $8.03 $0.80 $7.14 $28.92 Question 22 C-14 has a half life of 5730 years. An object contains 12.5% of the C-14 it originally had when it died. How long ago (in years) did the object die? 17190 O 5730 22920 11460 Question 1 Most of the alternative energies have what advantage O energy can easily be stored can be build anywhere cheap No CO2 emissions
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