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3 years ago

5

Define the first law of thermodynamic with one example.

1 answer:

DanielleElmas [232]3 years ago

7 0

Answer:

See explanation below.

Step-by-step explanation:

The first law of thermodynamic states that heat is a form of energy, and as such, is subject to the principle of conservation of energy (Energy is not destroyed or created but remains constant)

For example, when you put an ice cube in water, the ice will melt but the water will get colder, this is because the temperature between the ice cube and the water tends to an equilibrium and the total heat in the system remained the same during this time.

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Collin did the work to see if 10 is a solution to the equation r/4=2.5

Natasha2012 [34]

Answer:

Yes, because if you substitute 10 for r in the equation and simplify, you find that the equation is true.

Step-by-step explanation:

$\frac{r}{4} = 2.5 \\ lhs = \frac{r}{4} \\ = \frac{10}{4} \\ = 2.5 \\ = rhs \\ \therefore \: \frac{r}{4} = 2.5 \\$

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2 years ago

How much will he spend if he buys 4 pizzas and 5 drinks?

gtnhenbr [62]

Answer:

How much is each pizza and how much is each drink? set up your equation as 4p+5d = (your answer)

Step-by-step explanation:

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2 years ago

A = bh/2 solve for b

rjkz [21]

$A = \dfrac{bh}{2}$

Cross multiply:
$2A = bh$

Divide by h on both sides:
$b = \dfrac{2A}{h}$

8 0

2 years ago

Please help me. !no links or files! please and thank you :))

almond37 [142]

Answer:

7x+8m+7

Step-by-step explanation:

2(3x+4m)+x+7 =

6x+8m+x+7=

7x+8m+7

6 0

2 years ago

Read 2 more answers

The point (3,0) lies on a circle with the center at the origin. What is the area of the circle to the nearest hundredth?

juin [17]

we know that

the equation of a circle with the center at the origin is equal to

$x^{2} +y^{2} =r^{2}$

step 1

with the point (3,0) find the value of the radius

substitute the values of

$x=3\\ y=0$

in the equation of the circle above

so

$3^{2} +0^{2} =r^{2}$

$3^{2} =r^{2}$

$r =3$

step 2

with the radius find the area of the circle

area of the circle is equal to

$A=\pi *r^{2}$

for $r=3$

$A=\pi *3^{2}$

$A=28.27$ units²

therefore

the answer is

the area of the circle to the nearest hundredth is $A=28.27$ units²

4 0

3 years ago

Read 2 more answers