Louis Pasteur's experiment was A) <em>controlled</em>.
A scientist must change <em>only one variable at a time</em> to see if it is the one causing the observed change.
The scientist must keep all the other variables constant (i.e. <em>control </em>the variables)
Answer:
The correct option is;
c. Sound wave
Explanation:
The given options effect on mutation are given as follows;
a. Radiation
Radiation such as ultraviolet light and gamma radiation, which are electromagnetic waves, cause mutations by causing the formation of free radicals within an organism's cell resulting in the mutation characteristic effects
b. Smoking of tobacco has mutagenic effects due to the presence of several carcinogenic compounds in cigarettes
c. Sound wave is a form of mechanical wave and has no chemical effects on the chemistry of an organism and therefore does not cause mutation in cells
d. Chemical pollution can contain carcinogenic compounds that can cause mutations in the cells of organisms.
Answer:
you r correct it is layer a and b
Explanation:
Do you have a picture of the problem?
Answer:
Entropy increases and endothermic
Explanation:
The solid mentioned in the question, dissolves more when the temperature is increased. Also, increasing solvation of the salt increases the entropy. Thus, on increasing temperature, entropy will increase as more salt dissolves which results in more randomness.
On increasing temperature, the reaction rate increases which corresponds to endothermic reactions. Hence, the enthalpy of the dissolution will be positive and endothermic in nature.