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evablogger [386]
2 years ago
11

A 1.5kw vacuum cleaner is used for half an hour. Calculate its energy usage.​

Physics
1 answer:
juin [17]2 years ago
8 0

Answer:

its energy usage is 0.05

Explanation:

1.5kw/30=0.05

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Lena is playing with a remote-controlled car in her backyard. She knows that the car uses a wheel and axle to move. What is the
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Answer:

C. chemical energy from the batteries

Explanation:

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The car contains a battery cell that uses it's chemical energy as a source of power for the wheel and axle system. Hence, the chemical energy from the batteries of a remote-controlled car powers the wheel and axle to make the car move.

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2 years ago
What is the state of matter with definite volume?
Sedbober [7]
Solids and liquids have definite volumes while gases do not
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3 years ago
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Radda [10]

Answer:

the correct is C

Explanation:

The concept of a frame of reference is of crucial importance in physics, because it is the system from which measurements are made. Therefore, the relationships between the different reference frames must be clear so that the measurements made can be compared correctly.

In this case, the first observed sees the movement of the ball, suppose it moves a distance r, the second observed is next to me, separated by a distance x, therefore a frame of reference located in the movement of the ball. ball r '.

Consequently, the measurement carried out is related by

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where the bold letters indicate wind blowers.

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3 0
3 years ago
You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 13-m-hi
Andrew [12]

Answer:

22.15 N/m

Explanation:

As we know potential energy = m*g*h

Potential energy of spring = (1/2)kx^2

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3 0
2 years ago
Which three statements about electromagnetic radiation are true?
zvonat [6]

-- Light is electromagnetic radiation.

-- Electromagnetic radiation has no mass.

-- Electromagnetic radiation can travel through vacuum.

3 0
3 years ago
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