3 years ago

How much do a steel BB weight?

Physics

1 answer:

pychu [463]3 years ago

6 0

Each BB 0.349 grams and 5.386 grains. 349 mg & 5.386 grains each steel BBs.

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The meter is the S.I.unit for length.

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Tala wants to create a sound echo. She can create the echo using a pane of glass or a carpet square. Which one does she choose?

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Carpet asorbs sound, so glass should make it echo.

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3 years ago

Steam enters an adiabatic turbine at 5 MPa and 4500C and leaves at a pressure of 1.4 MPa. Determine the work output of the turbi

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Explanation:

Given the process is reversible adiabatic i.e it is isentropic

$P_1=5 MPa$

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3 years ago

Which organelle in the plant cell would mainly help the cell get rid of water and how do you know

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3 years ago

Mathematically, explain how a car (A) with mass of 500 kg and velocity of 2 m/s has the same kinetic energy as a car (B) with ma

scoray [572]

Answer:

<em>Both kinetic energies are equal</em>

Explanation:

<u>Kinetic Energy </u>

Is the type of energy of an object due to its state of motion. It's proportional to the mass and the square of the speed.

The equation for the kinetic energy is:

$\displaystyle K=\frac{1}{2}mv^2$

Where:

m = mass of the object

v = speed of the object

The kinetic energy is expressed in Joules (J)

There are two cars:

Car (A) with mass ma=500 kg and speed va= 2 m/s

Car (B) with mass mb=20,000 gr and speed vb= 10 m/s

Calculate the kinetic energy of both cars:

$\displaystyle K_a=\frac{1}{2}m_av_a^2$

$\displaystyle K_a=\frac{1}{2}500*2^2$

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To calculate the Kb, the mass must be expressed in kg:

mb=20,000/1,000 =20 Kg

$\displaystyle K_b=\frac{1}{2}m_bv_b^2$

$\displaystyle K_b=\frac{1}{2}20*10^2$

$\displaystyle K_b=10*100=1,000 J$

Both kinetic energies are equal

8 0

3 years ago