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Yuki888 [10]
3 years ago
6

Question 9 (28 points)

Physics
2 answers:
ladessa [460]3 years ago
5 0
Im sure the answer is letter B
Arte-miy333 [17]3 years ago
3 0

The moon's gravity  pulls back on the earth. <em> (B)</em>

The two pulls are EQUAL.

Gravity always produces a <u>pair</u> (2) of equal forces in opposite directions.  For example, your weight on the Earth is equal to the Earth's weight on you !

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A steel bar of rectangular cross section (1.5 in. 2 3 .0 in.) carries a tensile load P (see fig- ure). The allowable stresses in
lukranit [14]

Explanation:

Value of the cross-sectional area is as follows.

        A = 1.5 \times 2.30

           = 3.45 in^{2}

The given data is as follows.

          Allowable stress = 14,500 psi

          Shear stress = 7100 psi

Now, we will calculate maximum load from allowable stress as follows.

           P_{max} = \sigma_{a}A

                       = 14500 \times 3.45

                       = 50025 lb

Now, maximum load from shear stress is as follows.

           P_{max} = 2 \times \tau_{a} \times A

                      = 2 \times 7100 \times 3.45

                      = 48990 lb

Hence, P_{max} will be calculated as follows.

       P_{max} = min((P_{max})_{\sigma}, (P_{max})_{\tau})

                  = 48990 lb

Thus, we can conclude that the maximum permissible load P_{max} is 48990 lb.

4 0
3 years ago
The singing of an opera singer caused a drinking glass to shatter. Explain this using what you know about resonance.
rusak2 [61]

Explanation:

Resonance: Resonance is the phenomenon which occurs when the applied frequency on the object is equal to its natural frequency.

In the given problem, the singing of an opera singer caused a drinking glass to shatter.

This occurs due to the phenomenon resonance. The applied frequency of the singing of an opera singer on the drinking glass matches with the natural frequency of the drinking glass. It causes a glass to shatter.

5 0
3 years ago
Read 2 more answers
A student conducts an experimenting to test how the temperature of a ball affects its bounce height. The same ball is used for e
uysha [10]

the independent variable is what you're testing or changing in an experiment, so the answer is the temperature of the ball when its dropped.

i hope that helped <3

3 0
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Two friends are having a conversation. Anna says a satellite in orbit is in freefall because the satellite keeps falling toward
Leno4ka [110]

Answer:

Anna is correct.

Explanation:

Anna is right as a satellite is in free fall because it keeps falling toward Earth, meaning that gravity is the only force acting on it. Tom is incorrect because an object does not have to accelerate at a certain speed to be considered to be in free fall. As long as gravity is the only force acting upon the object, it is considered to be in free fall.

4 0
3 years ago
What is required foe electricity to flow
lukranit [14]
Conductivity is required for the electric current to flow.
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