Sonrisa owns a 300 W television. If the total energy usage for February is 32.4 kWh, how many hours per week does Sonrisa watch
2 answers:
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Answer: The correct answer is option (B).
Explanation:
Law of conservation of mass: 'In a chemical reaction, mass neither be created nor be destroyed'
In the balance chemical equation,total mass of the reactants is equal to the total mass of the products.
A.
117 g/mol ≠ 58.5 g/mol
Law of Conservation of Mass not followed.
B.
117 g/mol = 117 g/mol
Law of Conservation of Mass is followed.
C.
188 g/mol ≠ 117 g/mol
Law of Conservation of Mass not followed.
D.
94 g/mol ≠ 117 g/mol
Law of Conservation of Mass not followed.
Hence, the correct answer is option (B).
Answer:
468449163762.0812 W
Explanation:
m = Mass =
V = Volume =
r = Distance of sphere from isotropic point source of light = 0.5 m
R = Radius of sphere = 2 mm
= Density = 19 g/cm³
c = Speed of light =
A = Area =
I = Intensity =
g = Acceleration due to gravity = 9.81 m/s²
Force due to radiation is given by
According to the question
The power required of the light source is 468449163762.0812 W