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lina2011 [118]
2 years ago
13

Evaluate the expression a+b when a=23 and b=45 . Write in simplest form

Physics
1 answer:
Viefleur [7K]2 years ago
6 0
If a = 23 and b = 45

a + b = ?

23 + 45 = 68
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Potential energy can be converted into kinetic energy, a good example of this is when a pole-vaulter bends the pole during a lea
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Why did you lie about being in college?

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Using the free-body diagram, calculate the net force
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Dr. Smith is conducting an experiment to determine if paintings of landscapes produce more peaceful feelings than abstract paint
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The option that could be the hypothesis for this experiment is that D. Abstract paintings may elicit feelings of stress as students try to determine the meanings of the paintings; therefore, abstract paintings may cause college students to report lower feelings of peace.

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

It should be noted that a hypothesis simply means the proposed explanation made on the basis of limited evidence.

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3 0
1 year ago
A passenger train travels 392 mi in the same time that it takes a freight train to travel 322 mi. If the passenger train travels
Yuri [45]

Answer:

Explanation:

Given

distance traveled by  Passenger train is d_1=392\ mi

distance traveled by  Freight train is d_2=322\ mi

Both take same time to travel

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so speed of passenger train is 20+x mph

we know time=\frac{distance}{speed}

t=\frac{392}{20+x}=\frac{322}{x}

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2 years ago
If a 0.200-kilogram ball sits on a shelf 2.00 meters from the floor, how much mechanical energy (me) does it possess? More than
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Answer:

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Since ball is at rest so kinetic energy of the ball must be ZERO

Now for potential energy we know that

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so mechanical energy is given as

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5 0
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