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3 years ago

Freeeeeee pointssssss

Physics

1 answer:

Alenkinab [10]3 years ago

7 0

Answer:

Thanks for the points

Explanation:

Points

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What is the difference between free fall and weightlessness

TiliK225 [7]

Free fall means your falling because of gravity and weight and will eventually hit the ground without any protection. weightlessness means a place or time where there is no gravity and you're floating and not falling.

3 0

3 years ago

Read 2 more answers

2. Keith took a cube and measured the mass and volume of a

galben [10]

Answer:

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 36 g

volume = 6 cm³

We have

$density = \frac{36}{6} = 6 \\$

We have the final answer as

Hope this helps you

7 0

3 years ago

A railroad car with a mass of 30,000 kg is moving at 2.0 m/s when it runs into an at-rest freight car with an equal mass. The ca

11Alexandr11 [23.1K]

The total momentum of the system is preserved through the collision.

Note that momentum is
P = m*v
where m = mass
v = velocity.

Initial momentum:
P1 = (30000 kg)*(2 m/s) = 60000 (kg-m)/s for the moving car
P2 = 0 for the starionary car.

Final momentum:
P3 = (30000 + 30000)*v = 60000v (kg-m)/s

Because momentum is preserved,
P3 = P1 + P2
60000v = 60000
v = 1 m/s
The final velocity is 1 m/s.

Answer: 1.0 m/s

4 0

3 years ago

Help 100 points will give brainleyest

Airida [17]

Answer:

Explanation:

The sound waves are compromised. It decrompesses each time which makes the sound gets lower and lower.

7 0

3 years ago

What is the external-internal pressure difference when the diver's lungs are at a depth of 6.1m (about 20ft)? assume that the di

Nesterboy [21]

Snorkel connects the diver's lungs with the air above the water. Because of this, the pressure inside the diver's lungs is the same as the atmospheric pressure.
The static pressure of a fluid is given with this equation:
$P=\rho gh$
The density of water is 1000kg/m^3.
$P=1000\cdot 9.81 \cdot 6.1=59841$Pa$
Standart atmospheric pressure is 101<span>325Pa.
</span>The difference is:
$\Delta P=101325-59841=41484 $Pa$

8 0

3 years ago