true or false the speed of sound traveling through steel is much less than the speed of sound traveling through air

Answers

Answer 1

Answer: This is false. Sound travels faster through steel. That is why you can see people in movies putting their ear on the railroads to see whether a train is coming. That is because they can't hear it through air, but the sound travels through the steel.

Answer 2

Answer: True because steel is much heavier and will make the sound travel through it slower

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Water moves from Earth's surface to the atmosphere and back to Earth's surface again in a process known as the water cycle. Which of the following is the major form of energy driving the water cycle?A. nuclear energy
B. geothermal energy
C. solar energy
D. chemical energy

Answers

That's heat from the sun, which evaporates the water. (Choice-C)

Answer:

That's heat from the sun, which evaporates the water. (Choice-C)

Explanation:

How many prtons neutrons electrons are in helium

Answers

There are a truly huge, enormous number of all of them in
any sample of helium, no matter how small the sample is.

In just ONE ATOM of helium, there are 2 protons and 2 neutrons
inside the nucleus, and two electrons in the 'cloud' of probability
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Write the alignment of the Moon the Sun and the Earth causes a spring tide

Answers

it causes spring tide because the sun and the moon are though and it make rin

Spring tides occur when the Earth, sun and moon are aligned. Despite its name spring tides have nothing to do with the Spring season. It was derived from the concept of "springing-forth" . They occur at twice each lunar month, bringing higher tides during high tide and lower tides during low tide.

which organelle in the plant cell would mainly help the cell tack in water or get rid of water just like the potato did? this is also known as "osmosis" how do you know that this organelle would help with that process?

Answers

cell membrane;cellular respiration

A student that jumps a vertical height of 50 cm during the hang time activity.a. What is the hang time of the student?
b. What speed must the student leave the ground with to reach that height?

Answers

The hang time of the student is 0.64 seconds, and he must leave the ground with a speed of 3.13 m/s

Why?

To solve the problem, we must consider the vertical height reached by the student as max height.

We can use the following equations to solve the problem:

Initial speed calculations:

$v_(f)^(2)=v_(o)^(2)+2*a*d$

At max height, the speed tends to zero.

So, calculating, we have:

$v_(f)^(2)=v_(o)^(2)+2*a*d\n\n0=v_(o)^(2)+2*(-9.81(m)/(s^(2)))*0.5m\n\nv_(o)^(2)=9.81(m^(2) )/(s^(2))\n\nv_(o)=\sqrt{9.81(m^(2) )/(s^(2))}=3.13(m)/(s)$

Hang time calculations:

We must remember that the total hang time is equal to the time going up plus the time going down, and both of them are equal,so, calculating the time going down, we have have:

$y-yo=vo.t+(1)/(2)*9.81(m)/(s^(2))*t^(2) \n\n0.5m-0=0*t+4.95*t^(2)\n\nt^(2)=(0.5)/(4.95)\n\nt=√(0.101)=0.318s$

Then, for the total hang time, we have:

$TotalHangTime=2*0.318seconds=0.64seconds$

Have a nice day!

A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4.00 meters/second2. How long does it take the bike to reach the final velocity?

Answers

35-20 = 15m/s difference
15/4 = 3.75 seconds

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