Answer:
42 m/s
Explanation:
by definition of the velocity(speed) of a wave,
The velocity of light, v, is the product of its wavelength, λ , and its frequency, f.
V= fλ
frequency - number of occurances in a unit time
(check the graph)
How much energy is needed to change the temperature of 50.0 g of water by 15.0oc?
1 answer:
The amount of energy needed to increase the temperature of a substance by 
is given by:
where
m is the mass of the substance
Cs is the specific heat capacity of the substance
is the increase in temperature
In our problem, m=50.0 g,
(specific heat capacity of water) and 
, therefore the amount of energy needed is
where
m is the mass of the substance
Cs is the specific heat capacity of the substance
In our problem, m=50.0 g,
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