1-The current supplied by a battery in a portable device is typically 0.168 A. F

Question

1-The current supplied by a battery in a portable device is typically 0.168 A. Find the number of electrons passing through the device in eight hours. electrons 2-The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. At this unit price, calculate the cost that would result from each of the following:
(a) leaving a 60.0 W porch light on for 2 weeks while you are on vacation
$

(b) Making a piece of dark toast in 3.00 min with a 920 W toaster.
$

(c) drying a load of clothes in 40.0 min in a 4600 W dryer
$ 1-The current supplied by a battery in a portable device is typically 0.168 A. Find the number of electrons passing through the device in eight hours. electrons 1-The current supplied by a battery in a portable device is typically 0.168 A. Find the number of electrons passing through the device in eight hours. electrons 1-The current supplied by a battery in a portable device is typically 0.168 A. Find the number of electrons passing through the device in eight hours. electrons 1-The current supplied by a battery in a portable device is typically 0.168 A. Find the number of electrons passing through the device in eight hours. electrons 2-The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. At this unit price, calculate the cost that would result from each of the following:
(a) leaving a 60.0 W porch light on for 2 weeks while you are on vacation
$

(b) Making a piece of dark toast in 3.00 min with a 920 W toaster.
$

(c) drying a load of clothes in 40.0 min in a 4600 W dryer
$ 2-The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. At this unit price, calculate the cost that would result from each of the following:
(a) leaving a 60.0 W porch light on for 2 weeks while you are on vacation
$

(b) Making a piece of dark toast in 3.00 min with a 920 W toaster.
$

(c) drying a load of clothes in 40.0 min in a 4600 W dryer
$ 2-The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. At this unit price, calculate the cost that would result from each of the following:
(a) leaving a 60.0 W porch light on for 2 weeks while you are on vacation
$

(b) Making a piece of dark toast in 3.00 min with a 920 W toaster.
$

(c) drying a load of clothes in 40.0 min in a 4600 W dryer
$ 2-The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value. At this unit price, calculate the cost that would result from each of the following:
(a) leaving a 60.0 W porch light on for 2 weeks while you are on vacation
$

(b) Making a piece of dark toast in 3.00 min with a 920 W toaster.
$

(c) drying a load of clothes in 40.0 min in a 4600 W dryer
$ (a) leaving a 60.0 W porch light on for 2 weeks while you are on vacation
$

(b) Making a piece of dark toast in 3.00 min with a 920 W toaster.
$

(c) drying a load of clothes in 40.0 min in a 4600 W dryer
$

Explanation / Answer

charge=current*time

no of electrons=charge/(1.6*10^(-19))=3.024*10^22

2.a)total energy=60*2*7*24=20160 W.h=20.16 kW.h

cost=20.16*0.12=$2.4192

b)energy=920*(3/60)=0.046 kW.h

so cost=$5.52*10^(-3)

c)energy=(40/60)*4600=3066.67 w.h=3.06667 kw.h

cost=$0.368

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