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2 years ago

5

you measure or observe two events to occur at the same time one nearby and one further away. Which one did you actually see firs

t?

2 answers:

mihalych1998 [28]2 years ago

8 0

Your eyes and brain would first register the event nearby sooner than the one farther away

Kazeer [188]2 years ago

7 0

I would see the one nearby first because my eyes would react quicker to the one closer to me than the one further away from me.

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Average speed=total distance travelled/time

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2 years ago

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A rock is suspended by a light string. When the rock is in air, the tension in the string is 43.8 N . When the rock is totally i

sergeinik [125]

Answer:

Density of unknown liquid is $2047 kg/m^3$

Explanation:

When rock is suspended in air then the weight of the rock is counter balanced by the tension force in the string

So here we have

$T = mg = 43.8 N$

now when the rock is immersed in water then the tension in the string is and buoyancy force due to water is counter balanced by the weight of the object

so here we have

$T_1 + F_b = mg$

$31.3 + F_b = 43.8$

$F_b = 43.8 - 31.3 = 12.5 N$

now we have

$(1000)V(9.81) = 12.5$

$V = 1.27 \times 10^{-3} m^3$

now when the rock is immersed into other liquid then we have

$T_2 + F_b' = mg$

$18.3 + F_b' = 43.8$

$F_b' = 25.5 N$

now we have

$\rho(1.27 \times 10^{-3})(9.81) = 25.5$

$\rho = 2047 kg/m^3$

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3 years ago

Jack pushed and pushed, and finally moved the new refrigerator into the kitchen. What is the BEST explanation of what happened?

Anika [276]

Answer:

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Explanation:

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3 years ago

When, how and where are questions asked during critical inquiry?*<br> 1 p<br> True<br> False

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true

Explanation:

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2 years ago

In a system, when potential energy decreases, then entropy also decreases.<br><br> True<br> False

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Answer: False

Explanation:

The potential energy is called organized energy because it is not related to the mass movement of the molecules.

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If the randomness of the system increases then the entropy will increase. The entropy of the system either remains constant or increases.

The entropy of the system never decreases.

Therefore, the answer will be false.

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3 years ago