The change in kinetic energy was 34 kJ.
<em>Step 1</em>. Calculate the <em>total mass</em>
Total mass = 100 kg + 200 kg = 300 kg
<em>Step 2</em>. Calculate the <em>initial kinetic energy </em>(<em>KE</em>_i)
<em>v</em> = 0
<em>KE</em>_i = ½ <em>mv</em>^2 = ½ × 300 kg × 0^2 = 0
<em>Step 3</em>. Calculate the f<em>inal kinetic energy</em> (<em>KE</em>_f)
<em>KE</em>_f = ½ <em>mv</em>^2 = ½ × 300 kg × [15 m·s^(-1)]^2 = 34 000 kg·m^2s^(-2) = 34 000 J = 34 kJ
<em>Step 4</em>. Calculate the <em>change in kinetic energy
</em>
Δ<em>KE</em> = <em>KE</em>_f - <em>KE</em>_i = 34 kJ – 0 = 34 kJ
Object with a mass of 1.0 kilogram will weigh approximately 9.81 newtons (newton is the unit of force, while kilogram is the unit of mass) on the surface of the Earth (its mass multiplied by the gravitational field strength).
A. This is not a redox reaction. It is an example of combustion.
<h3>Combustion reaction of hydrocarbon</h3>
During the combustion of a hydrocarbon, the hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat.
<h3>Example of combustion reaction</h3>
2C8H18 + 25O2 → 16CO2 + 18H2O
Thus, we can conclude that, this is not a redox reaction. It is an example of combustion.
Learn more about combustion here: brainly.com/question/9425444
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Answer:
0.6802 mol
Explanation:
1 grams K2S = 0.00907 mol
0.00907 x 75 = 0.6802 mol