3 years ago

Sound cannot travel through a vacuum. Explain why.

1 answer:

3 0

Answer:

A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work on it.

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Anton [14]

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3 years ago

If a planet has a non-circular orbit around a star, as the planet moves closer towards a star its orbital speed ….

makkiz [27]

I think the answer you’re looking for is
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3 years ago

A group of bike riders took a 4 hour trip. During the first 3 hours, they traveled a total of 50 km, but

zlopas [31]

Answer:

15km/hr

Explanation:

The average speed for the entire trip is the sum of the total distance traveled divided by the total time of the trip.

Total time = 4hr

distance for the first 3hrs = 50km

distance for the last 1hr = 10km

Total distance = 50km + 10km = 60km

Now;

Average speed = $\frac{total distance }{time taken}$

Insert the parameters and solve;

Average speed = $\frac{60km}{4hr}$ = 15km/hr

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3 years ago

Suppose earth did not rotate.How would conditions and life on earth be different

ki77a [65]

If the earth did not rotate, one half of the earth would be dark and the other side of the Earth would be light. The bright side would be too hot and the other side would be too cold. Also if the Earth did not rotate, then the two poles and the equator would be easily effected.

3 0

2 years ago

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A car traveling at 10 m/s passes over a hill on a road that has a circular cross section of radius 30 m. What is the force exert

timofeeve [1]

Answer:

F= 389N

Explanation:

Using

Mg-N=mv²/ r

So N= mg- mv²/r

60*9.8- 60*10²/30

=389N

8 0

3 years ago