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Physics Examples
Step-by-Step Examples
Physics
Electricity
Find the Power
P
=
V
I
P
=
V
I
P
P
=
=
?
?
V
V
=
=
9.5
V
9.5
V
I
I
=
=
124
A
124
A
Step 1
Substitute the given values into
P
=
V
I
P
=
V
I
.
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Step 1.1
Substitute
9.5
V
9.5
V
for
V
V
.
P
=
9.5
V
I
P
=
9.5
V
I
Step 1.2
Substitute
124
A
124
A
for
I
I
.
P
=
9.5
V
(
124
A
)
P
=
9.5
V
(
124
A
)
P
=
9.50
V
(
124
A
)
P
=
9.50
V
(
124
A
)
Step 2
Simplify the right side.
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Step 2.1
Multiply
124
124
by
9.50
9.50
.
P
=
1178.00
(
V
A
)
P
=
1178.00
(
V
A
)
Step 2.2
Rewrite
V
A
V
A
as
W
W
.
P
=
1178.00
W
P
=
1178.00
W
P
=
1178.00
W
P
=
1178.00
W
Step 3
Round to
3
3
significant figures
.
P
=
1.18
⋅
10
3
W
P
=
1.18
⋅
10
3
W
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