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vladimir1956 [14]
3 years ago
11

Question 4

Physics
1 answer:
fgiga [73]3 years ago
4 0
Question 4:
some of the energy is being used to change the state of some of the water.

At some places in the pot, usually at the bottom right next to the fire, water
at 100°C is changing to steam at 100°C.  That "phase change" takes energy,
and the temperature doesn't change.

Question 5:
I have no questions about this. I understand it well enough for the time being.
I am confused by many things, but a pot of boiling water is not one of them.
I have no important feedback at this time, but please check back with me
in a week or two. 
Thank you. 

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All compasses have a _____ inside that lines up with the earth’s magnetic north.
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Answer:

magnet

Explanation:

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If a running system has a total change in heat of 295 joules, and it's running at a temperature of 402 kelvin, what is the entro
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When a mass of 29 g is attached to a certain spring, it makes 20 complete vibrations in 3.1 s. What is the spring constant of th
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Answer:

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Explanation:

Given that,

Mass that is attached with the spring, m = 29 g = 0.029 kg

The spring makes 20 complete vibrations in 3.1 s. We need to find the spring constant of the spring. We know that the number of oscillations per unit time is called frequency of an object. So,

f=\dfrac{20}{3.1}

f = 6.45 Hz

The frequency of oscillator is given by :

f=\dfrac{1}{2\pi}\sqrt{\dfrac{k}{m}}

k is the spring constant

k=4\pi^2f^2m

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k = 47.62 N/m

So, the spring constant of the spring is 47.62 N/m. Hence, this is the required solution.

4 0
3 years ago
A 1.0-kg block and a 2.0-kg block are pressed together on a horizontal frictionless surface with a compressed very light spring
Lunna [17]

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statement B is true

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comparing momenta of above two equations we get

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4 years ago
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