A. spider silk
Because it is also the thinnest of material
I would say C because the rest wouldn’t make sense, hope I helped ❤️
The S.I. unit for the measure of the pressure is the Pascal (Pa). 1 Pascal corresponds to
We can convert the number given by the problem into Pascal:
And since
, we have
- Blender . . . kinetic energy (of the spinning blade, then of the food or drink being blended)
- Speaker . . . sound energy
- Toaster . . . thermal (heat) energy
- Television . . . light energy (from the screen) and sound energy
- Ceiling Fan . . . kinetic energy (of the spinning fan, then of the air)
- Stove . . . thermal (heat) energy
- Washing Machine . . . kinetic energy (of the tub and stirrer, then of the water and clothes)
Answer:
60 J of heat are released from the system: Q=-60 J
20 J of work is done on the system: W=-20 J
∆U=Q-W
∆U=-60-(-20)
∆U=-40 J
Explanation:
If the heat is released from the system, Q should be negative.
If the heat is gained by the system, Q should be positive.
If the work is done on the system, W should be negative.
If the work is done by the system, W should be positive.