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Jobisdone [24]
3 years ago
9

What does the positive sign tell you about any vector quantity ?

Physics
1 answer:
vredina [299]3 years ago
5 0

Answer:

With a vector, however, the sign simply tells you about the direction of the vector. If you're travelling with a velocity of 20 km/hr east, it means you're travelling east, and your speed is 20 km/hr.

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Sophia is planning on going down an 8-m water slide. Her weight is 50 N. She knows that she has gravitational potential energy (
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Answer:

Explanation:

graph would be a straight line from (0, 0) to (400, 8)

Plot points are

PE = mgh

50(0) = 0 J

50(2) = 100 J

50(4) = 200 J

50(6) = 300 J

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4 0
3 years ago
Consider an isolated system, by which we mean a system free of external forces. If the sum of the particle energies in the syste
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Answer:

The system's potential energy is -147 J.

Explanation:

Given that,

Energy = 147 J

We know that,

System is isolated and it is free from external forces.

So, the work done by the external forces on the system should be equal to zero.

W=0

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Using thermodynamics first equation

\Delta U=W-\Delta E

Put the value into the formula

\Delta U=0-147

\Delta U=-147\ J

Hence, The system's potential energy is -147 J.

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3 years ago
A 1500 kg car is parked at the top of a hill 5.2 m high. At the bottom of the hill, what is the kinetic energy, in Joules, of th
irga5000 [103]

Answer:

10.1

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I think it's right?

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3 years ago
Which of the following BEST represent a good plan for decreasing your BMI?
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A solid element that is malleable' a good conductor of electricity, and reacts with oxygen is classified as a
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1) metal
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