Answer:
Therefore,
We can use Computer to surf internet for 5.7 hours.
Explanation:
Given:
For Clothes Dryer,
Current, I = 14 A
Voltage, V = 240 V
Time, t = 33 min = 33 × 60 = 1980 s
For Computer,
Current, I = 2.7 A
Voltage, V = 120 V
To Find:
Time, t = ? For Computer to surf with the Energy of Clothes Dryer,
Solution:
According to Joule's Law, Energy in joules for voltage "V" and Current "I" for time "t" second is given as,
For Clothes Dryer
Substituting the values we get
Now for Computer we have E = 6652.8 kJ, then time will be
Again we have,
Substituting the values we get
Time in Minutes,
Time in hours again we have to divide minutes by 60
Therefore,
We can use Computer to surf internet for 5.7 hours.
Answer: 624 Hz
Explanation:
If the ratio of the inductive reactance to the capacitive reactance, is 6.72, this means that it must be satified the following expression:
ωL / 1/ωC = 6.72
ω2 LC = 6.72 (1)
Now, at resonance, the inductive reactance and the capacitive reactance are equal each other in magnitude, as follows:
ωo L = 1/ωoC → ωo2 = 1/LC
So, as we know the resonance frequency, we can replace LC in (1) as follows:
ω2 / ωo2 = 6.72
Converting the angular frequencies to frequencies, we have:
4π2 f2 / 4π2 fo2 = 6.72
Simplifying and solving for f, we have:
f = 240 Hz . √6.72 = 624 Hz
As the circuit is inductive, f must be larger than the resonance frequency.
Answer:
Radiation therapy uses high-energy particles or waves, such as x-rays, gamma rays, electron beams, or protons, to destroy or damage cancer cells.Hope that helps
I believe your answer is C. my friend!
An energy of 25kJ is given out hence the reaction is exothermic.
<h3>What is a reaction?</h3>
Chemical reaction is said to occur when reactants combine leading to the formation of products. In a plot of the energy against the reaction profile, the topmost point of the graph is called the activation energy.
We know that a reaction is exothermic when reactants posses more energy than the products. Hence the enthalpy change for this reaction is;
ΔH = 5kJ - 30kJ = -25kJ thus the reaction is an exothermic reaction.
Now, the activation energy for the lighting of the match stick is high that is why a spark is required before the reaction gets underway. Heat is evolved in the process hence the reaction is exothermic. The energy of the reactants is greater than the energy of the products.
Learn more about exothermic reaction:brainly.com/question/10373907
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