You are a beautician about to apply a reducing agent to a customer with fine hair who wants to have his hair curly. Should the reducing agent be regular strength, concentrated, or diluted?
A) regular strength
B) concentrated, because in thin hair each strand is made of fewer cysteine amino acids
C) dilute, so as not to cause the hair to fall apart completely
D) concentrated, in order to add more disulfide cross-linking
Question 2
How are photovoltaic cells different from many other forms of solar energy?
A) Light is converted directly to electricity.
B) Light is converted into heat and then into steam.
C) Light is passively converted into heat.
D) Light is reflected and the coolness of the shade is used to provide a temperature differential.
E) none of the above
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