4 years ago

Helpppppppppppp meeeeeeeeeeeeeeeee

Physics

2 answers:

Trava [24]4 years ago

6 0

kinetic energy to gravitational potential energy

Irina18 [472]4 years ago

6 0

Answer:

I don't know if I'm correct but it might be

The second option with kinetic energy.

And again idk if im correct.

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Suppose a soup can is made from a sheet of steel19 which is .13 mm thick. If the can is 11 cm high and 6 cm in diameter, use dif

Flura [38]

Answer:

The can mass is 0,00359 kg or 3,59 g

Explanation:

1. Relevant Data:

Steel thickness= 0.13 mm or 0.013 mm

h=11 cm

d=6 cm

ρ=800 kg/m^3

2. Calculate mass from densisty equation:

$\rho=\frac{m}{v}$ , then $m=\rho .v$

We need to estimate the volume of the can to calculate the mass.

3. Estimate volume using differentials:

Cylinder volume equation is:

$V=\frac{1}{4}\pi d^{2}h$

Considering that the can is an object with a hole inside, then we need to estimate the real volume of the sheet of steel.

Using differentials we have:

$dV=\frac{1}{2}\pi Dh (dD)$

Then, we could say that $dD=0.013 cm$

Replacing the values of d, h and dD, we obtain:

$dV=\frac{1}{6}\pi (6 cm)(11 cm)(0,013 cm)$

$dV=0,4492 cm^3$

4. Calculate the mass

Convert volume unit into $m^3$

$0,4492 cm^3x\frac{1 m^3}{1x10^6 cm^3} =0,4492 x 10^-6 m^3$

Calculate mass

$m=\rho .v$

$m=8000 \frac{kg}{m^3}.0,4492 x10^-6 m^3$

$m=0,00359 kg =3,59 g$

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4 years ago

URGENT: Testing shows that a sample of wood from an artifact contains 50% of the

Murrr4er [49]

Answer:

Im so so sorry but I do now know how to do this

Explanation:

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It takes 8 seconds for a pulley system to lift a load that weights 400N to a height of 10 m. How much power is required?.

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Answer:

C. 500 watts

Explanation:

power is defined as the rate of work done

$power=\frac{work.done}{time}$

When a force causes a object to move, work is being done on the object by the force.

$work.done=force*displacement\\=400*10\\=4000J$

$power=\frac{4000J}{8s}\\=500 W$

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<span>Mechanical waves require a medium
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