Answer:
Efficiency = 30% = 0.3
Explanation:
The general formula for efficiency of a device is given as:
Efficiency = (Desired Output/ Input) * 100%
Here, in our case, we have a petrol engine as a device. So, we analyze it for the efficiency calculations. Here, we have:
Chemical Potential Energy = 1000 J
Kinetic Energy = 300 J
Heat and Sound Energy = 700 J
Now, we know that the desired output of a car or the purpose of a car is to provide Kinetic energy, while all other forms of energy such as heat and sound energies are produced as waste. And the chemical energy is provided to car as input, in form of fuel. Therefore,
Input = Chemical Potential Energy = 1000 J
Desired Output = Kinetic Energy = 300 J
Therefore,
Efficiency = (300 J/1000 J) * 100%
<u>Efficiency = 30% = 0.3</u>
Answer:
Heat
Explanation:
This combo can cause weather such as tornados,hurricanes and storms.
<span>Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula.
</span>With the rise of the sun, the remaining material began to clump up<span>. Small particles drew together, bound by the force of gravity, into larger particles. The solar wind swept away lighter elements, such as hydrogen and helium, from the closer regions, leaving only heavy, rocky materials to create </span>smaller terrestrial worlds<span> like Earth.
</span>
God did not create earth, it has been proven.
the atomic weight is 39.948
Assuming the turntable is circular, its circumference is
(2 π) x (its radius) .
That's the distance covered by a point on its rim during every complete revolution.
The distance covered by the same point during 45 revolutions is
(45) x (2 π) x (radius).
So we can write . . .
Speed of the point = (45 rev/min) · (2 · π · 8 cm / rev)
Speed = (720 π) cm/minute
Speed = 12π cm/second
Speed = 37.7 cm/sec
<em>Speed = 0.377 m/s </em>
