A motor has coils with a resistance of 3012 and operates from a voltage of 240 V. When the motor is operating at its maximum speed, the back emf is 145V. Find the current in the coils a) when the motor is first turned on b) when the motor has reached maximum speed c) If the current in the motor is 6.0A at some instant, what is the back emf at that time?​

battery with hi vtge high val resist in series

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

god i hope this !

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m