Aset of water waves travels at 10.0 m/s, and 4.0 waves pass you in 2.0 s. what is the wavelength of the waves?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Describe the function of the endomembrane system? what organelles are involved?