Oxygen is a reactant in a combination reaction, which always produces energy in the form of heat and light. A. True B. False
2 answers:
Answer: The given statement is false.
Explanation:
Combination reactions are defined as the reactions in which two or more substances that can be either elements or compounds when combine together then they result in the formation of a single compound.
For example,
Also, when oxygen atom combines with another substance then it is known as a combustion reaction. And, a combustion reaction will always release energy as they are exothermic in nature.
But is not necessary that light will always be produced in a combustion reaction.
Hence, we can conclude that the statement oxygen is a reactant in a combination reaction, which always produces energy in the form of heat and light, is false.
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Answer:
90,000 J
Explanation:
Kinetic energy can be found using the following formula.
where <em>m </em>is the mass in kilograms and <em>v</em> is the velocity in m/s.
We know the object has a mass of 50 kilograms. We also know it is a traveling at a rate of 60 m/s. Velocity is the speed of something, so the velocity of the object is 60 m/s.
<em>m</em>=50
<em>v</em>=60
Substitute these values into the formula.
First, evaluate the exponent: 60^2. 60^2 is the same as multiplying 60, 2 times.
60^2=60*60=3,600
Multiply 50 and 3,600
Multiply 1/2 and 3,600, or divide 3,600 by 2.
Add appropriate units. Kinetic energy uses Joules, or J.
The kinetic energy of the object is 90,000 Joules
Answer:
The current will be increased and also for the resistance.
Explanation:
The analysis of a direct current circuit can give us the explanation we need. Using the ohm law, which tells us that the voltage is equal to the product of the current by the resistance we have:
The voltage is equal to the potential difference therefore we will have these expressions:
If we increase the potential differential or circuit voltage, the current will also increase and so does the resistance by increasing the voltage. If we put numerical values in the equation given before, we can confirm this fact.