An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. The RMS current delivered to the answering machine is 580 mA. If the primary (input) coil of the transformer has 840 turns, then how many turns are there on the secondary (output) coil

35

Explanation:

We are given that

Initial voltage,

Final voltage,

Number of tuns in primary coil of the transformer,

Rms current,

We have to find the number of turns  are there on the secondary coil.

We know that

Using the formula

Hence, there are  number of turns on the secondary coil=35

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.