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3 years ago

PLEASE HELPPPPP WILL GIVE BRAINLIEST

Physics

1 answer:

aliya0001 [1]3 years ago

6 0

B. Unless you add more water molecules or you add a new substance, the mass should stay the same no matter what.

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Which of the following is the correct equation to calculate electrical energy? P = I/V V = P × I P = I × V E = P × t

Phoenix [80]

You haven't told us what any of those letters represents.

I'm going to assume that ...

-- ' P ' = power

-- ' I ' = circuit current

-- ' V ' = circuit voltage

-- ' E ' = energy

-- ' t ' = time.

Now I'm ready to answer the question that I just invented.

P = I / V

V = P x I

Both of these are false statements, and can't be used to calculate anything.

P = I x V is the correct equation to calculate electrical power.

E = P x t is the correct equation to calculate electrical energy.

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4 years ago

What is the main source of groundwater? A. precipitation falling into man-made wells B. precipitation seeping through pores and

Yuliya22 [10]

Answer:

B: precipitation seeping through pores and cracks in the ground

Explanation:

Man made wells aren't the main source because their isn't enough of them and morning dew doesn't go in to the ground in one main source.

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3 years ago

Which phenomenon is not the result of thin film interference? Question 15 options: stained glass windows colorful soap bubbles c

katen-ka-za [31]

Rainbows on an oily street after it's been raining. The colors in floating bubbles. Rainbows in the sink when using dish-soap.

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3 years ago

One liter is equal to 100 milliliters true or false

IRINA_888 [86]

Answer:

No, a liter is equal to 1000 milliliters

7 0

3 years ago

Read 2 more answers

An ideal gas in a sealed container has an initial volume of 2.50 L. At constant pressure, it is cooled to 21.00 ∘C, where its fi

goblinko [34]

Answer: The initial temperature of the system comes out to be 147 °C

Explanation:

To calculate the initial temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=2.50L\\T_1=?K\\V_2=1.75L\\T_2=25^oC=(25+273)K=294K$

Putting values in above equation, we get:

$\frac{2.50L}{T_1}=\frac{1.75L}{294K}\\\\T_1=420K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$420=T(^oC)+273\\T(^oC)=147^oC$

Hence, the initial temperature of the system comes out to be 147 °C

6 0

4 years ago