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3 years ago

Describe an object that emits radiation in Astronomy

Physics

1 answer:

DochEvi [55]3 years ago

4 0

Answer:

the sun

Explanation:

the sun emits all types of electromagnetic radiation but a vast majority of it comes in the for of in the for of visible light ultraviolet rays and infrarays

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(II) How much work did the movers do (horizontally) pushing a 46.0-kg crate 10.3 m across a rough floor without acceleration, if

Gwar [14]

Answer:

2324 J

Explanation:

The formula for work is:

$W=F*d$

where $F$ is the force applied, and $d$ is the distance moved, in this case $d=10.3m$

and we need to find $F.$

Since the crate is not moving up or down, we conclude that the <u>normal force must be equal to the weight </u>of the object:

$N=w$

where $N$ is the normal force and $w$ is the weight, which is: $w=mg$ , where g is the gravitational acceleration $g=9,81m/s^2$ and $m$ is the mass $m=46kg$ .

---------

Thus the normal force is:

$N=mg$

Now, the force due to the friction is defined as:

$f=\mu N=\mu mg$

where $\mu$ is the coefficient of friction, $\mu =0.5$

So, for the crate to move, the force applied must be equal to the frictional force:

$F=f\\F=\mu mg$

And now that we know the force we can calculate the work:

$W=F*d\\W=\mu mg*d$

substituting known values:

$W=(0.5)(46kg)(9.81m/s^2)(10.3)\\W=2324J$

5 0

3 years ago

Read 2 more answers

If you throw an apple towards the sky why its going up in spite of gravitational pull? .

Paul [167]

Answer:

due to tension force acting against gravitational pull

Explanation:

hope this somewhat helps :)

4 0

3 years ago

A hydraulic arrangement consists of a water-filled u-tube that is wider on one end than on the other. pistons are fitted in both

kow [346]

A hydraulic arrangement consists of a water- filled U-tube that is wider on one end than on the other. Pistons are fitted in both ends.

7 0

3 years ago

Thoughts about Genetically Modified Crops

Alex787 [66]

I think that GMOs, also known as genetically modified crops or organisms, can be used in good and bad ways. They can provide crops to survive longer, and produce a bigger portion. However, on the other side of that, it is claimed that it creates a large amount of greenhouse gas emissions, which can turn into climate change.

4 0

3 years ago

Read 2 more answers

A race card drives one lap around a race track that is 500 meters in length. How is this displacement different from the distanc

gulaghasi [49]

Answer:

Distance is 500 m, displacement is 0

Explanation:

Distance and displacement are defined in two different ways:

- Distance is the total length of the path covered by an object in motion - so it depends on the path taken. In this problem, the distance travelled by the car corresponds to the length of one lap, which is the length of the track, so 500 m

- Displacement is the distance in a straight line between the final point and the initial point of the motion. This means that displacement does not depend on the path taken, but only on the starting and ending point of the motion. In this problem, the car completes one lap, so the final position of the car is equal to its starting position - therefore the displacement is zero, since the distance between these two points is zero.

5 0

3 years ago