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IgorC [24]
3 years ago
5

Which changes would cause an increase in the resistance of a wire? Check all that apply.

Chemistry
2 answers:
chubhunter [2.5K]3 years ago
9 0

Answer:

Increasing its temperature.

Longer

and thinner

Explanation:

e2021

OLEGan [10]3 years ago
6 0

Answer:

increasing its temperature

using a longer wire

using a thinner wire

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How much heat, in calories, is needed to raise the temperature of 125.0 g of Lead (c lead = 0.130 J/g°C) from 17.5°C to 41.1°C?
pav-90 [236]
95.6 cal
are needed.
Explanation:
Use the following equation:
q
=
m
c
Δ
T
,
where:
q
is heat energy,
m
is mass,
c
is specific heat capacity, and
Δ
T
is the change in temperature.
Δ
T
=
T
final
−
T
initial
Known
m
=
125 g
c
Pb
=
0.130
J
g
⋅
∘
C
T
initial
=
17.5
∘
C
T
final
=
42.1
∘
C
Δ
T
=
42.1
∘
C
−
17.5
∘
C
=
24.6
∘
C
Unknown
q
Solution
Plug the known values into the equation and solve.
q
=
(
125
g
)
×
(
0.130
J
g
⋅
∘
C
)
×
(
24.6
∘
C
)
=
400. J

(rounded to three significant figures)
Convert Joules to calories
1 J
=
0.2389 cal
to four significant figures.
400
.
J
×
0.2389
cal
1
J
=
95.6 cal

(rounded to three significant figures)
95.6 cal
are needed.
8 0
3 years ago
How many post does it take to support a fence 200 ft long if a post is every 20 feet?
Art [367]
10 because you divide 200 by 20


3 0
3 years ago
What is the correct expression for molarity
Oliga [24]
It is a number of moles of solute divided by the number of liters of solution! Hope this helps! :D
7 0
3 years ago
Read 2 more answers
8.
White raven [17]

Answer:

mixture of four compounds

mixture of two elements and two compounds

Explanation:

  1. it can be one of those
  2. can u tell me if its correct pls I'm studying this too

6 0
3 years ago
How many elements are represented in the formula CaCO3
Vlada [557]

Answer:

3

Explanation:

calcium (Ca)

carbon(C)

oxygen(O)

hope u like it ‍❤️‍‍❤️‍‍

For any question comment me

5 0
3 years ago
Read 2 more answers
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