Answer:
Taking responsibility for your own learning makes it easier to identify your strengths and weaknesses. Once these have been identified you can work on a learning plan that focuses on the areas that you need most help with, increasing the speed of your learning, and build the skills you have been trying to perfect.
Explanation:
Answer:
Not possible.
Explanation:
According to second law of thermodynamics, the maximum efficiency any heat engine could achieve is Carnot Efficiency η defined by:
Where
and are temperature (in Kelvin) of heat source and heatsink respectively
In our case (I will be using K = 273+°C) :
In percentage, this is 14.28% efficiency, which is the <em>maximum</em> theoretical efficiency <em>any</em> heat engine could have while working between -27 and 14 °C temperature. Any claim of more efficient heat engine between these 2 temperature are violates the second law of thermodynamics. Therefore, the claim must be false.
Answer:
a parking lot hope this helps :)
Answer:
The given statement "A negative normal strain can be considered to increase or decrease volume depending on coordinate system used" is
b) False
Explanation:
Normal strain refers to the strain due to normal stress which is when the applied stress is perpendicular to the surface.
Negative normal strain results in compression or contraction further leading to a decrease in volume while a positive normal strain results in elongation thus giving rise to an increase in volume.
Answer:
Roughly, an electric toaster oven on for 30 minutes uses: d) 2 million Joules of energy
Explanation:
An average toaster oven uses around 1.2 kW (or 1200 W) of power.
If it is on for 30 minutes, we can calculate how much energy it will use, knowing that energy equals power times time (that the machine is using power), taking into account units (kWh=kW*h and J=W*s):
As we assumed the power of the toaster, it is enough to say that an electric toaster oven uses roughly 2 million Joules, as there is only an 8% () difference between our calculated value and the rough estimation.