4 years ago

What is the difference between sound waves and water waves

1 answer:

8 0

Sound waves are three dimensional they spread out in all directions from the source of the sound.
and water waves are essentially two dimensional i.e., on the surface of water.

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True or False:In a current, electrons will always flow from negative to positive.

DIA [1.3K]

It should be true: electrons low from negative toward positive to negative toward positive because opposite charges attract each other.

I hope this was correct

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3 years ago

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John runs around a 126.5 m circular track 3.5 times in 4.17 minutes. What is his average speed?

sdas [7]

Average speed = distance traveled / time

average speed = (126.5 m * 3.5 laps) / (4.17 min)

= 106.2 m/min

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3 years ago

What molecule determines the characteristics a child will inherit from its parents?

Korvikt [17]

Answer:

A molecule called DNA (deoxyribonucleic acid) is passed from adult organisms to their offspring during reproduction. This molecule containsthe instructions for an organism to develop, grow, survive and reproduce.

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2 years ago

An elephant kicks a 2.5 kg rock that is initially at rest. The

erma4kov [3.2K]

0.20Answer:

Explanation:

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3 years ago

An automobile starter motor has an equivalent resistance of 0.055 Ï and is supplied by a 12.0 v battery which has a 0.0305 Ï int

LiRa [457]

12 V is the f.e.m. $\epsilon$ of the battery. The potential difference that is applied to the motor is actually the fem minus the voltage drop on the internal resistance r:
$\epsilon - Ir$
this is equal to the voltage drop on the resistance of the motor R:
$RI$
so we can write:
$\epsilon - Ir = RI$
and using $r=0.0305~\Omega$ and $R=0.055~\Omega$ we can find the current I:
$I= \frac{\epsilon}{R+r}=140~A$

8 0

3 years ago