Sam would have to purchase 42 cans of dog food each week.
Determine what the question is asking. Write down the relevant information in simple statements. Assign symbols to unknown values that need to be found. Determine how the statements relate to each other mathematically.
To find the answer we can set up an equation : 3 (x) (d)
x = number of cans each dog eats
d = the number of days in a week.
Thus,
Number of Cans to purchase = 3 (2) (7)=42
Therefore, Sam would have to purchase 42 cans of dog food each week.
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b. Which of the following statements is true?
A) The average kinetic energy of the ice in cup A is less than that in cup
b.
B)The average kinetic energy of the ice in cup A is greater than that cup in
b.
C)The average kinetic energy of the ice cup A is equal to that in cup
b.
D)The average kinetic energies of the ice in cup A and the ice in cup B are not comparable.
Average kinetic energy is given by the formula:
KE(average) = 3/2*k*T
where k = Boltzmann constant = 1.38*10⁻²³ J/K
T = temperature in Kelvin (K)
Thus, the average KE is dependent only on temperature and independent of mass.
Since the temp in Cup A and B remains the same, the average KE will also be the same.
Ans C)
(2) 2+ (4) 4+
The volume remains the same.
The amount of solvent increases.
The concentration increases.