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3 years ago

What happens to the speed of an object that is dropped in free fall

1 answer:

8 0

If it's not falling through air, water, smoke, or anything else,
and gravity is the only force on it, then its speed increases
at a constant rate ... 9.8 meters per second for every second
it falls. (That's the number on Earth. It's different in other places.)

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What’s the power if a student does 2240j of work for 2.8 seconds

Alex787 [66]

Answer:

800 Watts

Explanation:

Power = Work/time

Working in SI units, Power = Watts, Work = Joules, Time = seconds.

Power = 2240J/2.8s = 800 Watts.

7 0

3 years ago

How was helium first discovered?

lora16 [44]

I think it’s the third one idk tho

3 0

3 years ago

Read 2 more answers

Two in-phase loudspeakers, which emit sound in all directions, are sitting side by side. One of them is moved sideways by 4.0 mm

loris [4]

Answer:

4.4721m

Explanation:

#Use Pythagorean theorem to find the distance between the two speakers:

$a^+b^2=c^2\\4^2+2^2=d^2\\\sqrt{20}\ mm=d$

There are antinodes 1/4,1/2 and 3/4 of the distance between speakers.

The greatest antinode is 3/4-1/4=1/2

#Distance between consecutive antinodes is:

$0.5\times \sqrt{20}=\lambda/2\\\\\lambda=4.4721m$

Hence, the maximum possible wavelength of the sound waves is 4.4721m

6 0

3 years ago

Solve for A if F=MA and F=100 and M=25?

inn [45]

Answer:

<h3> $\boxed{ \boxed{ \bold{A = 4}}}$ </h3>

Explanation:

Given,

F = 100 , M = 25

Now, let's find the value of A

$\sf{F = MA}$

plug the values

⇒ $\sf{100 = 25 A}$

Swap the sides of the equation

⇒ $\sf{25A = 100}$

Divide both sides of the equation by 25

⇒ $\sf{ \frac{25A}{25} = \frac{100}{25} }$

Calculate

⇒ $\sf{A = 4}$

Hope I helped!

Best regards!!

5 0

3 years ago

Read 2 more answers

In the formula used to solve problems related to the first law of thermodynamics what does Q represent?

KonstantinChe [14]

The heat Q(in) supplied to the system in one stage of the cycle, minus the heat Q(out) removed from it in another stage of the cycle; plus the work added to the system W(in) equals the work that leaves the system W(out)

4 0

3 years ago