What you see rising from the road ... and call "heat waves" ...
are rising currents of air. The air that's been heated by
contact with the hot asphalt rises. (Why ? By being heated,
it becomes less dense than the other air around it, and the
buoyant force of being a less dense substance in a more dense
fluid makes it rise (float) ).
If we want to paint a complete picture, we can find all three
types of heat transfer going on here:
1). The air getting heated by direct contact with the hot road ==> conduction
2). The hot air rising through the cooler air around it ==> convection
3). How the road got so hot in the first place ==> radiation, from the sun
Answer:
1) energy = 15.6 kWh, 2) total_cost = $ 2.03
Explanation:
1) The energy dissipated is the product of the power and the time of use In a month it was used t = 6.5 h and the power of the toaster is
P = 2400 W = 2,400 kW
energy = P t
energy = 2,400 6.5
energy = 15.6 kWh
using rounding to a decimal
energy = 15.6 kWh
2) The cost of energy is unit_cost = $ 0.13 / kWh
so the total cost
total_cost = energy unit_cost
total_cost = 15.6 0.13
total_cost = $ 2.028
rounding to two decimal places
total_cost = $ 2.03
Answer:
Try B or C if I'm wrong sorry
Explanation:
Answer:
The more velocity an object has the harder it is to slow it down
Explanation:
slow it down
Electron affinity is the tendency of a metal to accept electrons. In a general battery, one terminal has a higher electron affinity than the other, which attracts more electrons towards it, as compared to the other terminal. This potential difference between terminals create the voltage of the battery.
