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Stella [2.4K]
3 years ago
6

Im sorry i dont understand pls helpp -w-

Physics
2 answers:
rodikova [14]3 years ago
7 0
Temperature is related to a physical change of a substance because it determines the state of the object via cooling, heating or freezing. To make the concept clear, hear are some examples:-
1. Chocolate melts and turns into liquid form. This is a physical change
2. Water freezes via cooling and forms ice which is in a solid state. This is another physical change

Hope this helped and have a nice day : )

Savatey [412]3 years ago
3 0

Explanation:

it's about kinetic energy

with more heat particles in a substance get energy

with more cold atoms or molecules lose energy

both change the way particles are arranged

the way particles are arranged make something a has liquid or substance

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3 years ago
A heat pump receives heat from a lake that has an average winter time temperature of 6o C and supplies heat into a house having
Natalija [7]

Answer:

Explanation:

60000 kJ / h = 60000 x 1000 / (60 x 60 )

= 16667 J /s

a)

\frac{Q_H}{W} =\frac{T_H}{T_H-T_C}

where Q_H and W are heat supplied and heat given from  outside source .

Here Q_H = 16667 J/s

\frac{T_H}{T_H-T_C}=\frac{298}{298-279}

= 15.684

Q_H = 16667 J/s

16667 / W = 15.684

W= minimum power supplied  = 1062.7 W.

b )

If  T_C=283K

\frac{T_H}{T_H-T_C}=\frac{298}{298-283}

=19.87

\frac{Q_H}{W} = 19.87

W=\frac{Q_H}{19.87}

W=\frac{16667}{19.87}

= 838.8 W .

4 0
4 years ago
"Conclude how Newton's first, second, and third laws apply to you eating your breakfast." ​
valkas [14]

Answer: well you get it for energy i think right

Explanation:

4 0
3 years ago
Which two fields of study do the principles of biomechanics come from? A. science and technology B. physics and engineering C. b
kati45 [8]

Answer:

B. physics and engineering

Explanation:

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A waiter carries a plate on top of his arm. The waiter's arm applies an upward force to the plate and holds it up. This force is
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I believe it is away from his arm since the question states his arm is applying an upwards force
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