Answer:
Dilute
Explanation:
A dilute is a substance <u>mixed</u> with water to make it thinner or weaker.
Yes, the Ozone Layer does affect our heath.
(a). The power of the candy bar is,
The time taken to play on 800 kJ energy of the candy bar is,
where E is the energy.
Substituting the known values,
As 1 minute is equal to 60 seconds,
Thus,
Thus, the time taken to play tennis on the 800 kJ energy is 30.3 minutes.
(b). By doing the exercise, the process of digestion of food inside our body increases. Thus, the exercise does not helps us to burn the calories. But it helps us to diggest the heavy meal like candy bar easily.
The time taken to digest the canndy bar or to utilise its energy is large because it takes a lot of time to burn small amount of food and make it digest quickly.
Answer:
C: A lighthouse on a nearby island
Explanation:
Since the ship is in the water, therefore it is in motion compared the reference point "a lighthouse on a nearby island". This is because this reference point is stable and doesn't move and can also be seen from long distance.
Answer:
Wavelength at which the light reflected by the film is brightest = 567.5 nm
Explanation:
We are given;
index of refraction n2 = 1.33
Thickness;(t) = 320 nm
Now the wavelength at which the light reflected by the film is brightest is gotten from the formula for path difference in critical interference as;
Path difference = (m + ½)(λ/n)
Where;
path difference = 2 x thickness = 2(320) = 640 nm
λ = Wavelength at which the light reflected by the film is brightest
n is Refractive index
m is an integer = 0,1,2,3...
Thus; at m = 0;
We have;
640 = (0 + ½)(λ/1.33)
640 = (λ/2.66)
λ = 640 x 2.66
λ = 1702.4 nm
at m = 1;
We have;
640 = (1 + ½)(λ/1.33)
640 = (3/2)(λ/1.33)
λ = 640 x 1.33 x 2/3
λ = 567.5 nm
at m = 2;
We have;
640 = (2 + ½)(λ/1.33)
640 = (5/2)(λ/1.33)
λ = 640 x 2 x 1.33/5
λ = 340.5 nm
Since we are told that the wavelength is between 400 – 690 nm.
Thus, the wavelength at which the light reflected by the film is brightest is the higher value gotten that is between 400nm and 690nm.
Thus, Wavelength at which the light reflected by the film is brightest = 567.5 nm