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3 years ago

Who proposed the idea that gravity could actually bend light?

Physics

1 answer:

MrMuchimi3 years ago

3 0

It is d because albert einstein was physics scienctist

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what is the percent efficiency of a light bulb that emits 14 joules of light for every 60 joules of electric energy thst enters

jasenka [17]

If you're using the bulb as a source of light, then it's. 14/60 = 23.3% efficient.
If you're using it to heat a bird nest or a hamster cage, then it's. 46/60 = 76.7% efficient !
It just depends on your point of view, and what you consider 'useful' output.

5 0

3 years ago

TRUE OR FALSE? We can see every member of the electromagnetic spectrum?

Svetradugi [14.3K]

It is false. We see only a few members of <span>electromagnetic spectrum</span>

Hope it helps!

4 0

3 years ago

Read 2 more answers

Сс<br> Explain the effect of Earth's gravity on objects on the<br> surface of Earth.

dem82 [27]

Answer:

The effect of gravity on object makes objects stable and not floating in the air . It also makes any object thrown up to return back

6 0

3 years ago

Two charges are repelling each other with a force magnitude F. If each charge doubled and the distance between the charges becam

eduard

Answer:

(1/4)F

Explanation:

Let F be the force on charges q and q' separated by a distance, d

F = kqq'/d²

Now, if q and q' are doubled, our new charges are 2q and 2q' respectively and, if the distnace is increased by four times, then our new distance is 4d. So our new force F' = k (2q)(2q')/(4d)²

= 4kqq'/16d²

= kqq'/4d²

= F/4

So, the magnitude of our new force is F/4

7 0

3 years ago

Which is true concerning the acceleration due to gravity? A. It decreases with increasing altitude. B. It is different for diffe

Kisachek [45]

Answer:

The correct answer is option 'a': It decreases with increase in altitude

Explanation:

Acceleration due to gravity is the acceleration that a body is subjected to when it is freely dropped from a height from surface of any planet, ignoring the resistance that the object may face in it's motion such as drag due to any fluid.. The acceleration due to gravity is same for all the objects and is independent of their masses, it only depends on the mass of the planet and the radius of the planet on which the object is dropped. it's values varies with:

1) Depth from surface of planet.

2)Height from surface of planet.

3) Latitude of the object.

Hence it neither is a fundamental quantity nor an universal constant.

The variation of acceleration due to gravity with height can be mathematically written as:

$g(h)=g_{surface}(1-\frac{2h}{R_{planet}})$

where,

R is the radius of the planet

$g_{surface}$ is value of acceleration due to gravity at surface.

hence we can see that upon increase in altitude the value of 'g' goes on decreasing.

5 0

3 years ago