Electricity

-What is the clearest way of differing kW(Kilo-watt) and kWh(Kilo-watt/hour)?I get confused sometimes.

-Why does atoms in a conductor heat up when gaining enegry from electric charges?

Forces and pressure(basic)

-How does streamlined shapes reduce air resistance?

-Why is the friction produced by frictional force going in different direction of the motion?

-How does a spring balance measure friction?(Need a bit of a more simpler explanation)

 

Would appreciate if anyone chip in to help!

 

Thank you so much in advanced

-What is the clearest way of differing kW(Kilo-watt) and kWh(Kilo-watt/hour)?I get confused sometimes.

kW is kilo Watt.

Watt is unit of power W = kg * m^2 * s^-3.

Power is energy divided by time.

P=E/t

 

kWh is kilo Watt-hour.

When you multiply power by time, result is energy (in Joules as unit in SI) J = kg * m^2 * s^-2.

E=P*t

Edited July 18, 20178 yr by Sensei

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Moderator Note

It's probably best to separate your questions into separate topics rather than have them all get mixed up in one thread.

Should i seperate it now?

Should i seperate it now?

 

 

Yes. Go ahead and post threads on individual topics.