You have a device that needs a voltage reference of 3.0 V, but you have only a 9.0 V battery. Fortunately, you also have several 10 k!1 resistors. Show how you can use the resistors and the battery to make a circuit that provides a potential difference of3.0 V.

Given Information:

Input voltage = Vin = 9 V

Resistors = R = 10 kΩ each

Output voltage = Vout = 3 V

Required Information:

How many 10 kΩ resistors would it take = ?

It would take three 10 kΩ resistors

Explanation:

We can make a voltage divider circuit that contains 3 resistors in series each having a value of 10 kΩ that will provide the desired voltage of 3 V.

Vout = Vin(R/Req)

If we choose 3 resistors of 10 kΩ each

Req = 10 + 10 + 10 = 30 kΩ

Vout = 9(10/30)

Vout = 9(1/3)

Vout = 3 V

Therefore, we would need three 10 kΩ resistors to get the desired voltage of 3 V.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​