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Solnce55 [7]
3 years ago
10

Rex makes himself a bowl of cereal. He puts 28 g of cereal in a bowl and then adds 245 g of milk. Before eating the cereal, he r

emembers that he has not yet finished his homework, and he runs off to his room to complete his work.
Fifteen minutes later, Rex comes back to the kitchen to eat his cereal. He notices that the milk has soaked into the cereal grains and made them larger. Which of the following is true about Rex's cereal-milk mixture?
Physics
1 answer:
Galina-37 [17]3 years ago
5 0

Answer:

A.)

Explanation:

Because you didn't add anything or take anything away.

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A ladder is balanced against a wall without moving. What<br> must be true about this ladder?
Mandarinka [93]

Answer:a no net force

Explanation: google lol

6 0
3 years ago
An old light bulb draws only 54.3 W, rather than its original 60.0 W, due to evaporative thinning of its filament. By what facto
Lemur [1.5K]

Answer:

The factor of the diameter is 0.95.

Explanation:

Given that,

Power of old light bulb = 54.3 W

Power = 60 W

We know that,

The resistance is inversely proportional to the diameter.

R\propto\dfrac{1}{D}

The power is inversely proportional to the resistance.

P\propto\dfrac{1}{R}

P\propto D^2

We need to calculate the factor of the diameter of the filament reduced

Using relation of power and diameter

\dfrac{P_{i}}{P_{f}}=\dfrac{D_{i}^2}{D_{f}^2}

Put the value into the formula

\dfrac{D_{i}^2}{D_{f}^2}=\dfrac{54.3}{60}

\dfrac{D_{i}}{D_{f}}=0.95

D_{i}=0.95 D_{f}

Hence, The factor of the diameter is 0.95.

7 0
3 years ago
Read 2 more answers
If the car’s speed decreases at a constant rate from 64 mi/h to 30 mi/h in 3.0 s, what is the magnitude of its acceleration, ass
mixas84 [53]

Answer:3.874 m/s^2

Explanation:

Given

Car speed decreases at a constant rate from 64 mi/h to 30 mi/h

in 3 sec

60mi/h \approx 26.8224m/s

34mi/h \approx 15.1994 m/s

we know acceleration is given by =\frac{velocity}{Time}

a=\frac{15.1994-26.8224}{3}

a=-3.874 m/s^2

negative indicates that it is stopping the car

Distance traveled

v^2-u^2=2as

\left ( 15.1994\right )^2-\left ( 26.8224\right )^2=2\left ( -3.874\right )s

s=\frac{488.419}{2\times 3.874}

s=63.038 m

7 0
3 years ago
What happens whenever energy is transformed from one form to another?
andriy [413]

Answer:

Energy transformation is when energy changes from one form to another – like in a hydroelectric dam that transforms the kinetic energy of water into electrical energy. While energy can be transferred or transformed, the total amount of energy does not change – this is called energy conservation.

Explanation:

Hope This Helps!!

God Bless!!

~DuffyDuck~

3 0
2 years ago
Somebody please help me
Ksju [112]

The conversion steps listed above in order from start to finish are already in an arranged form from 1-4.

<h3>What is a biosphere?</h3>

A biosphere can be defined as the part of the earth that supports life. These include :

  • aquatic,

  • desert,

  • forest,

  • grassland and

  • tundra.

The flow of energy through the biosphere includes

  • Energy from the sun which is as a result of the nuclear fusion,

  • the energy released is absorbed by plant chlorophyll,

  • Chemical energy is released during respiration.

  • Photosynthesis converts carbon dioxide and water into glucose and oxygen.

Learn more about biosphere here:

brainly.com/question/12467010

#SPJ1

4 0
2 years ago
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