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Aleonysh [2.5K]
3 years ago
8

Which three statements are true of all matter?

Physics
1 answer:
Snezhnost [94]3 years ago
8 0

Answer:

B, D and E, not all matter can be filled with air

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Suppose that you and three classmates are discussing the design of a roller coaster. One says that each hill must be lower than
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Answer:

I would say that I agree with the one that said that each hill must be lower than the previous one and use the principle of conservation of energy to explain.

Explanation:

Roller coaster are usually designed such that its total energy remains conserved at any point on the track. Now,  the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. At certain height on the track, the total energy of the roller coaster is in form of potential energy, which gets converted to kinetic energy as soon as it starts sliding down the hill till get to the hill's endpoint where it has maximum kinetic energy. The cycle of sliding from a high point on the track to a low point on the track means there is potential energy is converted to kinetic energy and kinetic energy then converts back to potential energy and the cycle continues.

However, due to the effect of gravity and frictional force between the track and the coaster, the energy of the coaster is gradually reduces, so it becomes a bit difficult for the coaster to move to the next hill of the same height. It is for this reason that each hill must be lower than the previous one, so that the coaster can overcome the next hill's height with its reduced energy until it loses all its energy and comes to a stop.

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Can Volcanoes create new landforms such as mountains
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At $.110 per kWh, what does it cost to leave a 40-W porch light on day and night for a year?
nlexa [21]

The cost of electricity be  $ 38.544.

<h3>What is electricity?</h3>

Electricity is the passage of charges in a conductor. From one end of the terminal to the other, charges are transmitted. Usually, the terminal moves from positive to negative. Since the nucleus holds the electrons loosely, they can move freely throughout the body.

Watts are units of power used to measure electrical output. 

Price of electricity is $ 0.110 per kWh .

If a 40-W porch light on day and night for a year, total amount of electricity spend = power of the bulb × time

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= 40 W × 365 day

= 40 W × 365 ×24 h

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Learn more about electricity here:

brainly.com/question/8971780

#SPJ1

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