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4 years ago

Which statement about the physical change of liquid water boiling into steam is true

Physics

2 answers:

ioda4 years ago

6 0

Answer:

The heat added represents an energy change.

Explanation:

Whenever the heat is supplied to the water at normal atmospheric pressure, its molecules gain the thermal energy and their kinetic energy increases, the inter-molecular bonding decreases due to which its molecules leave the surface of water and convert into the vapor form.

The action can be reversed by condensation.
The mass of the matter remains conserved irrespective of its phase.
There is a loss of weight in the water phase because some of the molecules are now in the gaseous state but if we calculate the total mass of all the water particles before and after the process it remains constant.

sp2606 [1]4 years ago

3 0

Option 1 would be right one ! as the heat added represent itself into the energy change

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Express 68 rations in dekarations

rewona [7]

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68 rations * 0.1 dekarations/1 ration = 6.8 dekarations

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3 years ago

What is the main function of chloroplasts?

dangina [55]

Answer:

To convert sunlight into usable sugars

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Explanation:

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4 years ago

Aunt Mary needs to hang a picture in her bedroom. She uses a hammer to drive the nail into the wall. Find the force exerted by t

icang [17]

Answer:

50N

Explanation:

Impulse = Force × Time

25 = Force × 0.5

Force = 25/0.5

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3 years ago

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maxonik [38]

Well the mean is when you add up the answers together and divide by how many there is so
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3 years ago

A speeding car traveling at 24.8 m/s passes a police car that is at rest. The police car begins its pursuit at the instant the s

marusya05 [52]

Answer:

the acceleration required is 1.37m/s^2

Explanation:

The car is having a constant velocity movement, so if we calculate the time to reach 897m, we can use it to find the acceleration the policeman need to apply to reach the car.

$x=v*t\\t=\frac{x}{v}\\t=\frac{897m}{24.8m/s}\\t=36.17s$

the policeman is traveling with a constant acceleration starting from rest so:

$x=\frac{1}{2}*a*t^2\\\\a=\frac{2*x}{t^2}\\\\a=1.37 m/s2$

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3 years ago