How many states a water has
2 answers:
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Answer:
Energy, E = 18 kJ
Explanation:
Given that,
Power of the lightbulb, P = 5 W
We need to find the electrical energy produced by the lightbulb in one hour. We know that electric power is given by the electrical energy produced per unit time.
1 hour = 3600 seconds
Electric power :
or
E = 18 kJ
So, 18 kJ of electrical energy a 5-W lightbulb convert to radiant and thermal energy in one hour.
Answer:
A. 8
Explanation:
Atomic number of oxygen = 8
Oxygen is the 8th element in periodic table.
Atomic no. = 8, means one oxygen atom has 8 protons. Now, because the atom is neutral, so number of electrons = no. of protons in an atom.
Hence, the number of electrons in a neutral oxygen atom is 8.
