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Liula [17]
3 years ago
11

A book rests on a table, exerting a downward force on the table. the reaction to this force is:

Physics
1 answer:
lapo4ka [179]3 years ago
4 0
The upward force the table exerts on the ground!
Equal and opposite forces.
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A tennis ball is tossed upward with a speed of 3.0 m/s. We can ignore air resistance. What is the velocity of the ball .40 secon
alexira [117]

Answer:

<em>Hello, The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).</em>

Explanation:

The equation for the velocity of an object thrown upward is the following:

v = v0 + g · t

Where:

v = velocity of the ball.

v0 = initial velocity.

g = acceleration due to gravity (-9.8 m/s² considering the upward direction as positive).

t = time.

To find the velocity of the ball at t = 0.40 s, we have to replace "t" by 0.40 s in the equation:

v = v0 + g · t

v = 3.0 m/s - 9.8 m/s² · 0.40 s

v = -0.92 m/s

The velocity of the ball is 0.92 m/s in the downward direction (-0.92 m/s).

<em>Hope That Helps!</em>

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calculate the pressure exerted on the floor when a elephant who weighs 6000N stands on 1 foot which has a area of 20m
Roman55 [17]

Answer:

1500n

Explanation:

5 0
2 years ago
Two students were climbing stairs at school. Student 1 has a weight of 700 N. Student 2 has a weight of 650 N. How much power wo
KIM [24]

Student 1 would have a power 467 W and student 2 would have a power of 433 W. The correct option is the fourth option - Student 1 would have 467 W, and Student 2 would have 433 W of power.

From the question,

We are to calculate the power each student would have to climb the flight of stairs.

Power can be calculated using the formula

P = \frac{F \times d}{t}

Where

P is Power

F is the force

d is the distance

and t is the time

NOTE: The weight of the students represent the force

  • For student 1

F = 700 N

d = 4 m

t = 6 s

∴ P = \frac{700 \times 4}{6}

P = 467 W

  • For student 2

F = 650 N

d = 4 m

t = 6 s

∴ P = \frac{650 \times 4}{6}

P = 433 W

Hence, Student 1 would have a power 467 W and student 2 would have a power of 433 W. The correct option is the fourth option - Student 1 would have 467 W, and Student 2 would have 433 W of power.

Learn more here: brainly.com/question/18801566

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student saw a science fiction movie in which a spaceship was zooming through space. The sound of the engine was loud. However, h
Serhud [2]
Sound waves move through molecules. When there are no molecules in a certain space, sound cannot travel - whether in a vacuum or in space. 
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3 years ago
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Match each word to it's correct meaning.
Ivan

Answer:

fluid transfer of heat by the motion of the particles of gas or fluid

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