Denisity, Efficieny (& Power) Flashcards
1
Q
What is density?
A
Density is the amount of mass in a volume, it tells you how tightly matter is packed together.
2
Q
What is the equation for density?
A
Density= mass
————
Volume
Mass= density X volume
Volume = mass/ density
3
Q
What is volume measured in?
A
M3
4
Q
What is mass measured in?
A
Kg
5
Q
What is the symbol for density?
A
P
6
Q
Equation for power?
A
P= E
——
T
E= P X T
T= E/ P
(Power =p, Energy = E, Time= T)
7
Q
1 watt is equal to how many joules per second?
A
1 j per s
8
Q
1 KW is equal to what J per S?
A
1000 J per S
9
Q
What is the equation for efficiency & power?
A
Efficiency = useful power out
————————-
Total power in (X100%)
