Sunspots are storms on the sun’s surface that are marked by intense magnetic activity. Sunspots are cooler than the rest of the Sun, but many scientists enctis think that when there are a lot of sunspots, the Sun actually gets hotter. This affects the weather here on Earth, and also radio reception. Without sunspots the Earth would probably be cooler.
Answer: 7750 J
Explanation:
Mechanical energy is potential energy added to kinetic energy.
5000 + 2750 J = 7750 J
Answer:
the speed of the fluid in the wider section of the pipe is 1m/s.
Explanation:
By equation of continuity we can write (for ideal (non-viscous, in-compressible).
A_1,A_2 are areas of the pipe at inlet and outlet of the pipe.
_1
Here, d_1 , d_2 are diameters of inlet and outlet, also v_1, v_2 are velocities at inlet and outlet.
putting values we get
solving we get
Kinetic energy is the energy something possesses because of its motion when something is heated the particles begin to move more and greater distance occurs creating thermal expansion