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Sliva [168]
3 years ago
6

Which force is opposite gravity?

Physics
2 answers:
lora16 [44]3 years ago
7 0

normal force is the opposite of gravity

aev [14]3 years ago
5 0

The answer you are looking for is A

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A star is estimated to be 4.8 x 10^15 kilometers away from the earth. When we see this star in the night sky, how old is this im
Veseljchak [2.6K]

Answer:

B. 500 years

Explanation:

The light coming from the star and reaching us on the Earth travels with uniform motion (with constant velocity), so we can use the equation of uniform motion which relates distance covered, speed and time taken:

v=\frac{d}{t}

where

v is the speed

d is the distance covered

t is the time taken

In this problem:

v=3.00\cdot 10^8 m/s is the speed at which light travels

d=4.8\cdot 10^{15} km = 4.8\cdot 10^{18}m is the distance that light has to cover from the star to the Earth

Therefore, by rearranging the equation, we can find the time:

t=\frac{d}{v}=\frac{4.8\cdot 10^{18}}{3.00\cdot 10^8}=1.6\cdot 10^{10}s

And by converting into years, this time is

t=\frac{1.6\cdot 10^{10}}{(365)(24)(60)(60)}=507 y

So, approximately 500 years: this means that the image we see of the star is 500 years old.

4 0
3 years ago
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gtnhenbr [62]

Answer:

Catch these points g thanks

Explanation:

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________ can occur when an analog connection creates an electromagnetic field around its conductors, inducing its waveforms on a
KatRina [158]

Answer:

Crosstalk

Explanation:

The answer is Crosstalk as this phenomenon is most commonly associated with analog phone call.

Now, crosstalk is defined as a disturbance caused by the electric or magnetic fields of one telecommunication signal which affects a signal in an adjacent circuit. In a telephone circuit, crosstalk could result in hearing part of a voice conversation from another circuit. Hence, the phenomenon that causes crosstalk is called electromagnetic interference (EMI). This may occur in microcircuits within computers and audio equipments including within network circuits. This term is also usually applied to optical signals that interfere with each other.

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3 years ago
Indicate whether the statement is true or false. The point located at the geometric center of an object is called the object's c
zmey [24]
This statement is true. The point located at the geometric center of an object is indeed called the object's center of gravity. Center of gravity is the average of the weight of a resultant of the parallel forces, including all the particles that is passing through its body.
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What is it called when velocity changes over time
natka813 [3]
Well,

When an object's velocity changes, we call it acceleration.

Acceleration: The time rate of change in an object's velocity
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3 years ago
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