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garik1379 [7]
3 years ago
8

A car speeds up as it rolls down a hill. Which is this an example of? A. positive acceleration B. negative acceleration C. relat

ive velocity
Physics
1 answer:
alina1380 [7]3 years ago
4 0
I believe it is A. positive acceleration since it is speeding up
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A 1.00-kg sample of steam at 100.0 °C condenses to water at 100.0 °C. What is the entropy change of the sample if the latent hea
Sunny_sXe [5.5K]

Answer:

The entropy change of the sample of water =  6.059 x 10³ J/K.mol

Explanation:

Entropy: Entropy can be defined as the measure of the degree of disorder or randomness of a substance. The S.I unit of Entropy is J/K.mol

Mathematically, entropy is expressed as

ΔS = ΔH/T....................... Equation 1

Where ΔH = heat absorbed or evolved, T = absolute temperature.

<em>Given:  If 1 mole of water = 0.0018 kg,</em>

<em>ΔH = latent heat × mass = 2.26 x 10⁶ × 1 = 2.26x 10⁶ J.</em>

<em>T = 100 °C = (100+273)  K = 373 K.</em>

<em>Substituting these values into equation 1,</em>

<em>ΔS =2.26x 10⁶/373</em>

ΔS = 6.059 x 10³ J/K.mol

Therefore the entropy change of the sample of water =  6.059 x 10³ J/K.mol

7 0
3 years ago
Select the correct answer.
elixir [45]

A) Energy is absorbed in the reaction.

Such reactions are called endothermic reactions.

5 0
3 years ago
Read 2 more answers
Which is an example of qualitative data?
LiRa [457]
The answer is C)the rating that the golfers give Callaway clubs
6 0
2 years ago
11. A car travels at 25 m/s to the North. It has an acceleration of 2 m/s’ to the south
Anna11 [10]

Answer:

delta x= 100m

Explanation:

vi= 25 meters

a= -27meters

t=20s

find delta x

4 0
2 years ago
I’d really appreciate it if someone could help
Vanyuwa [196]

Answer:

0.25

Explanation:

Friction force is the normal force times the coefficient of friction.

F = Nμ

50 N = (200 N) μ

μ = 0.25

6 0
3 years ago
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