Why is it important to use placebos and a double-blind approach in some studies

1 answer:

6 0

Another name for these two words is "constant" and you want to have a "constant", because you want something to compare your experimental group to, to see whether data had changed or not. So you have placebos or a double- blind to compare your experimental group to it and also so you know you don't have a bias or anything in the study.

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What is the requirement for a core to be used in an electromagnet?

xxMikexx [17]

D. It must be able to be magnetized

Explanation:

The requirement for a core to be used in an electromagnet is that it must be able to be magnetized.

An electromagnet is a type of magnet produced by electricity.

They typically run and produce magnetic fields in the vicinity of electrical currents.
These magnets are not permanent magnets.
When the electrical current is removed, the magnetic property of the substance is lost.
The core of an electromagnet is usually made up of a material that can easily be magnetized in the presence of magnetic fields.
Some of the materials used are cobalt, iron, nickel.

learn more:

Electromagnet brainly.com/question/2191993

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3 years ago

A proton and an electron are released from rest in the center of a capacitor.

Sunny_sXe [5.5K]

Answer:

a) equal 1, b) less than 1

Explanation:

a) the electric force is given by

Fe = q E