units

[sarahartzell1A]

When using DeBroglie's equation do you have to calculate given values into certain units before putting them into the equation?

[Douglas Nguyen 2J]

When using DeBroglie's equation do you have to calculate given values into certain units before putting them into the equation?

DeBroglie's wavelength formula is lambda=h/mv. Lambda (wavelength) must be in meters but can be converted after the calculation if the question asks for a different unit.Planck's constant is given in J*s, momentum is given in kg*m/s, mass is given in kg, and velocity is given in m/s. If not converted to the proper units, the units won't cancel each other out.

[Chloe Thorpe 1J]

Yes, you have to convert the units to SI units in order to cross out the units. It helps if you write out all the units, like 1 J = 1 kg*m^2*s^-2, and then cross off as you go to make sure you get the right conversion.

[Hanniel U 2B]

It depends. Sometimes you would have to use kg*m^2*s^-2 instead of J*s to cancel out and get the right units at the end of your calculations.