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nata0808 [166]
3 years ago
7

Cell phones are widely used by people all over the world as a medium of communication. When a person makes a call from a cell ph

one, the cell phone emits electromagnetic waves that are intercepted by a nearby cell phone tower. The cell phone tower then connects the call to the phone of the person being called.
Which of the following processes enables a cell phone to receive communications from a cell phone tower?
A.
Electromagnetic waves from the tower produce an electric current in the cell phone's internal circuit when intercepted by the phone's antenna.
B.
Electromagnetic waves from the tower are reflected by the cell phone, producing an electromagnetic field that is detected by the internal circuits of the phone.
C.
Electromagnetic waves diffract around the cell phone's antenna, which allows the waves to be detected by the internal circuits of the phone.
D.
Electromagnetic waves from the tower interfere with the radio waves emitted by the cell phone, producing electric currents in the internal circuits of the phone.
Chemistry
2 answers:
klasskru [66]3 years ago
6 0

Answer:

A Electromagnetic waves from the tower produce an electric current in the cell phone's internal circuit when intercepted by the phone's antenna.

Explanation:

Its correct I just did it

SSSSS [86.1K]3 years ago
4 0

Answer:

that's a lot of words, i cant read all that

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1.How many moles of each element are in 0.0250 mol of K 2 Cr O 4?
garik1379 [7]

Answer:

1. In 0.0250 moles of potassium chromate there are 0.05 moles of potassium , 0.025 moles of chromium and 0.1 moles of oxygen are present.

2. In 4.50 moles of ammonium carbonate there are 9 moles of ammonium ions and 4.5 moles of carbonate ions are present.

Explanation:

1.

Moles of potassium chromate = 0.0250 mol

Formula of potassium chromate = K_2CrO_4

1 mole of potassium chromate has 2 moles of potassium , 1 mole of chromium and 4 moles of oxygen.

Then in 0.0250 moles of potassium chromate:

Moles of potassium will be:

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Moles of chromium will be:

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Moles of oxygen will be:

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2.

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Formula of ammonium carbonate =(NH_4)_2CO_3

1 mole of ammonium carbonate has 2 moles of ammonium ion and 1  mole of carbonate ion.

Then in 4.50 moles of ammonium carbonate:

Moles of ammonium ion will be:

2\times 4.50 mol= 9mol

Moles of carbonate ions will be:

1\times 4.50 mol= 4.5 mol

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