Which process is used to make a semiconductor into a transistor?

A) removing valence electrons

B) adding a dopant

C) changing to a nonmetal

D) applying voltage across the surface

Atmospheric pressure on the peak of Mt. Everest can be as low as 0.30 atm, which is why most climbers need to bring oxygen tanks for the last part of their climb. At the base camp, these tanks have a pressure of 40.0 atm.

A cart is given an initial velocity of 5.0 m/s and experiencesa constant acceleration of 2.0 m/s ^2. What is the magnitude of thecart's displacement during the first 6.0 s of its motion?

A step-down transformer has 1027 turns on the side which draws from a high voltage line (2201 V). How many turns does it need on the low voltage side to supply a house with current at 120 V?

Push or pull of one object to another

There are approximately 1609 meters per mile. If the sun is 93 million miles away, how far is the sun in kilometers to two significant figures.

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?

Which type of circuit is more useful and why

how much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 3 ohms?