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elixir [45]
3 years ago
5

A forest fire makes a loud roaring sound. The explosive processes that release energy from the Sun occur at a much higher temper

ature. Why don’t you hear a roaring sound from the sun?
Physics
2 answers:
snow_tiger [21]3 years ago
8 0
Sound needs a material medium to propagate through. There is no medium in space, so sound from the sun can't GO anywhere.
The other interesting question is how heat and light from the sun DO get here.
KengaRu [80]3 years ago
5 0
Becuase for sound to happen you need air, And there is no oxygen is space. 

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You push a cart with mass 30 kg forward, giving it an acceleration of 5 m/s2How much force did you apply? O A. 0.17 N O B. 35 N
umka21 [38]

Answer:

150N

Explanation:

To find the force applied remember that force equals to Mass multiply by the Acceleration.

F=Ma

=30*5

=150N

3 0
3 years ago
A field researcher uses the slow-motion feature on her phones camera to shoot a video of an eel spinning at its maximum rate. Th
posledela

Answer:

\alpha=(1/120)*14*360=42degrees

Explanation:

Eels have been recorded to spin at up to 14 revolutions per second when feeding in this way

So the angle the eel rotate is going to be

Camera record 120 frames per second

time taken for 1 frame record

t_t= 1/120 seconds

eel rotates

\alpha_1=14rev *360degrees in 1 second

so:

eel rotetas \alpha=(1/120)*14*360=42degrees

5 0
3 years ago
Diego hypothesizes that the Earth wobbles on its axis in a pattern that is repeated every 20,000 years.
DedPeter [7]

Answer:

D. make a model

Explanation:

3 0
3 years ago
How many swings would a 23 cm long pendulum make in 30 seconds?
iragen [17]

Is there any possible chance that at some point in your science
studies, sometime before you were given this question for your
homework, that maybe you might have encountered this formula
for the period of a simple pendulum ?

                   Period = (2 pi) √(length/gravity) .

If the length is 0.23 meter, and the
acceleration of gravity is 9.8 m/s²,
then the period is

                                 = (2 pi) √(0.23/9.8)

                                 =   0.963... second  (rounded)

That's how long it takes for a simple pendulum, 23cm long,
hanging on a massless string and not swinging too far to
the side, to complete one full swing left and right.

Now, if you can figure out how many periods of  0.963 second
there are in  30 seconds, you'll have your answer.  I'll leave
that part of it to you.

8 0
3 years ago
An engine is designed to obtain energy from the temperature gradient of the ocean. What is the thermodynamic efficiency of such
rewona [7]

Answer:

0.035 (3.5 %)

Explanation:

The thermodynamic efficiency is given by:

\eta = 1 - \frac{T_C}{T_H}

where

T_C is the cold temperature

T_H is the hot temperature

In this problem we have

T_C = 5 ^{\circ}C+ 273 = 278 KT_H = 15^{\circ}C+273 = 288 K

So the efficiency is

\eta = 1 - \frac{278 K}{288 K}=0.035

6 0
3 years ago
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