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Gwar [14]
3 years ago
14

What happens to energy during a change of state? Why is it a physical change?​

Mathematics
1 answer:
Flura [38]3 years ago
5 0

Answer & Explanation:

Energy is heat. For example, if you boil a cup of water it has more energy than   a cup at room temperature. It is considered a physical change because its properties do not change only the state of matter. On the other hand, if wood burns then that is a chemical change because it changes its chemical properties. Please rank as Brainliest if this helps! Thank you!

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Stuffed animals at a toy
MariettaO [177]

Answer:

48

Step-by-step explanation:

12 x 4 = 48

8 0
3 years ago
Read 2 more answers
W+ 1/2=1/4w + 2 can somebody help me plz
katrin [286]

Answer:

w=2

Step-by-step explanation:

I'm too lazy to explain the first part but here:

3/4w=6/4

w=2

3 0
3 years ago
what is the standart dievation of 63 and 37 and what is the standart dievation of 88 and 112 this is a sample not a population
PilotLPTM [1.2K]

Answer:

https://www.calculators.org/math/standard-deviation.php

Step-by-step explanation:

you can calculate standard deviation from here with proper working plus accurate results.

7 0
3 years ago
Help please! thanks! <br> Find the length of AB<br> A. 2.89<br> B. 33.13<br> C. 378.63<br> D. 377.19
Naddik [55]
<h3>Answer:  29 miles (approximate)</h3>

======================================================

Explanation:

Segment AB is already given to be 19 miles long.

I'm assuming your teacher meant to ask about side BC, which is side 'a' since it's opposite angle A.

Use the law of cosines to find the missing side

a^2 = b^2 + c^2 - 2*b*c*cos(A)

a^2 = 12^2 + 19^2 - 2*12*19*cos(138)

a^2 = 843.874040417691

a = sqrt(843.874040417691)

a = 29.0495101579647

a = 29 when rounding to the nearest whole number

Side BC is roughly 29 miles long.

8 0
2 years ago
A= bh;<br> A = 28, h = 4
kozerog [31]
28= b(4)
divide both sides by 4. to leave the variable b alone
Answer: 7=b
8 0
3 years ago
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