Answer: He has only move 0.2 yards
Explanation: When you subtract 18.3 from 18.5 you get 0.2 and that is how much he's moved
Answer:
.
Explanation:
Assume that his calorimeter is sufficiently effective, such that no heat had escaped to the surroundings. Heat from this solution would be absorbed by either
- the solution, or
- the coffee cup.
Temperature change:
.
<h3>Heat absorbed by the solution:</h3>
Only the specific heat capacity (per unit mass) of the solution is given. Both the mass of the solution and the temperature change will be required for determining the energy change. Start by finding the mass of the solution.
.
Calculate the amount of heat absorbed from the specific heat:
.
<h3>Heat absorbed by the coffee cup:</h3>
The heat capacity of the coffee cup is given. Only the temperature change will be required for finding the amount of heat absorbed.
.
<h3>Heat that this reaction produces</h3>
Find the sum of the two parts of heat. Round to three significant figures as in the heat capacity of the coffee cup and the density of the solution.
.
The voltage in the resistor is 63 V
Explanation:
We can solve the problem by applying Ohm's law, which states the relationship between voltage, current and resistance in a resistor:

where
V is the voltage
R is the resistance
I is the current
For the resistor in this problem, we have:
I = 0.42 A is the current
is the resistance
Substituting into the equation, we find the voltage needed:

Learn more about voltage and current:
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Answer: C
Explanation: Ball 2 - Ball 1 - Ball 4 - Ball 3