Answer:
Answer in explanation
Explanation:
Water is mainly used as coolant in heating systems like hot-water radiators. The main function of water in such systems, is to absorb as much heat as possible, in order to decrease the temperature of the system and as a result cool it.
The specific heat capacity is the measure of heat energy that is required to raise the temperature of unit mass of a substance through 1 °C. In other words, specific heat capacity quantifies the amount of heat that can be stored by a unit mass of a substance having a degree rise in temperature.
Thus, the more specific heat a substance has, the more heat it can absorb from the hot system. Hence, the specific heat capacity of a coolant must be high.
<u>This is the reason why water, with its high specific heat capacity, is utilized for heating systems, such as radiators.</u>
Answer:
27.34 (no unit)
Explanation:
26.975*82.33%+29.018*17.67%
=27.34
Answer:
- From <u>2,150 kilowatt hours</u> will qualify for the heavy user classification.
Explanation:
Since the monthly electric consumption for January follows a normal distribution, you must use a standard normal table (Z table), which provides the probabilities for the (normalized) Z-scores.
The top 6% of electric consumption, means that you must find the z-score for which the probablitiy is ≥ 0.06.
The corresponding z-score shown in the table is 1.555.
Now just use the equation:
Where:
- μ = mean = 1,650 kilowatt hours
- σ = standard deviation = 320 kilowatt hours
- x = the value of your variable, which you will determine
Substituting:
- 1.555 = (x - 1,650) / 320
- x = 320 × 1.555 + 1,650 = 2,148 ≈ 2,150
- x ≈ 2,150 kilowatt hours.
A Mechanical wave is a wave the does require a medium to transfer.
The arrows at the side would be compression, and the arrow pointing down should be labeled tension :)
