Which of the following are formulas for power? Choose all that apply.
p = mv
P = I^2R
PV = nRT
P = F/A
P = Dgh
P = (DeltaE)/(Deltat)
P = IV
m v is momentum
i^2 R = iR * i = V*i = power
PV is energy number of mols * constant * Temp
F/A is pressure
I do not know what D is, density? anyway not power
dE/dt is energy/time = power
I do not know what P = I V is .If you mean current times voltage, i V then yes, power
To determine which of the given options are formulas for power, let's go through each option and analyze them:
1. p = mv:
This equation is not a direct formula for power. It represents the momentum of an object (p) which is the product of its mass (m) and velocity (v).
2. P = I^2R:
This equation is a formula for electrical power. It represents the power (P) dissipated by a circuit element with resistance (R) when a current (I) flows through it.
3. PV = nRT:
This equation is the ideal gas law (or equation of state). It relates the pressure (P), volume (V), number of moles (n), gas constant (R), and temperature (T) of an ideal gas. It is not a formula for power.
4. P = F/A:
This equation represents the formula for pressure in a fluid system, where the power (P) is equal to the force (F) applied on an area (A). It does not directly represent power in terms of work or energy.
5. P = Dgh:
This equation represents the formula for gravitational potential energy per unit time, where the power (P) is equal to the change in elevation (Dh) multiplied by the acceleration due to gravity (g).
6. P = (DeltaE)/(Deltat):
This equation represents the formula for power in terms of energy, where the power (P) is equal to the change in energy (DeltaE) divided by the change in time (Deltat).
7. P = IV:
This equation is a formula for electrical power, where the power (P) is equal to the product of the current (I) and the voltage (V) across a device.
Based on the analysis, the formulas for power among the given options are:
- P = I^2R
- P = (DeltaE)/(Deltat)
- P = IV
Therefore, options 2, 6, and 7 are all formulas for power.