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3 years ago

What effects can occur when heat energy is added to a system?

Physics

2 answers:

Sergeeva-Olga [200]3 years ago

5 0

Increase in temperature
Change of state
Phase change

Vika [28.1K]3 years ago

3 0

<h2>Answer:</h2>

when heat energy is added to a system, change in system can be:

Increase in temperature: If system doesn't absorb the heat energy, then the effect will be increase in temperature.
Change of state: If system absorbs the heat energy. And energy change in system can change the state of system.
Phase change: If system absorbs the heat energy then the phase of system can be changed. For example liquid can be converted into vapors by adding heat energy to system.

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Calculate the acceleration of the car for each set of conditions using the formula a = (v2 – v1) / (t2 – t1) where v2 and v1 are

Arisa [49]

Answer: 1. 0.19

2. 0.33

3. 0.47

4. 0.62

Explanation: just did it & these are the correct answers

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3 years ago

Read 2 more answers

A worker on the roof of a house drops his 0.46 kg hammer, which slides down the roof at constant speed of 9.88 m/s. The roof mak

nekit [7.7K]

Answer:

The horizontal distance travelled in that time lapse is 12.94 m

Explanation:

In order to solve this problem, we'll need:

The horizontal speed
the time the hammer takes to fall from the roof to the ground

At the lowest point of the roof, the hammer has a 9.88 m/s speed that makes an angle of 27° with the horizontal, so we can calculate the horizontal and vertical speed with trigonometry. If we take right as x positive and down as y positive we get

$v_{x}=v*cos(27)=9.88 m/s *cos(27)=8.80 m/s \\v_{y}=v*sen(27)=9.88 m/s *sen(27)=4.49 m/s$

Now, we make two movement equation as we have a URM (no acceleration) in x and an ARM (gravity as acceleration) in y. We will wisely pick the lowest point of the roof as the origin of coordinates

$x(t)=8.8 m/s *t$

$y(t)=4.49m/s*t+\frac{1}{2}*9.8m/s^{2}*t^{2}$

Now we calculate the time the hammer takes to get to the floor

$17.1m=4.49m/s*t+\frac{1}{2}*9.8m/s^{2}*t^{2}\\t=1.47s$ or $t=-2.38s$

Now, we keep the positive time result and calculate the horizontal distance travelled

$x(1.47s)=8.8m/s*1.47s=12.94m$

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3 years ago

How does the gravitational pull of the blue supergiants impact the direction of your star?

Gennadij [26K]

Answer:

Blue supergiants represent a slower burning phase in the death of a massive star. Due to core nuclear reactions being slightly slower, the star contracts and since very similar energy is coming from a much smaller area (photosphere) then the star's surface becomes much hotter.

Explanation:

I know this may not be the answer youre looking for, but hopefully this can help somehow!

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3 years ago

How much does a 60 kg table weigh

soldier1979 [14.2K]

Answer:

588 N

Explanation:

weigh = Mg

I hope you got that. Thanks and upovote that

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3 years ago

The frequency of violet light is 7.5x10 to the 14th power hertz. What is the wavelength?

Verizon [17]

Wavelength times frequency = speed of light
7.5E14 x wavelength = 300,000 m/s

Wavelength in meters = 300,000 divided by 7.5E14

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3 years ago