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Anvisha [2.4K]
3 years ago
13

Carlos is studying the characteristics of a fundamental force. The force is sometimes repulsive and sometimes attractive. Which

force could Carlos be studying?
a.gravitational or strong nuclear
b.electromagnetic or weak nuclear
c.weak nuclear or strong nuclear
d.electromagnetic or gravitational
Biology
1 answer:
aleksklad [387]3 years ago
6 0
The answer to this question would be: <span>b.electromagnetic or weak nuclear
</span>
The electromagnetic force can be repulsive or attractive because it was influenced by the magnetic charge. The same charge (positive with positive) will be repulsive but different charge will be attractive(negative and negative). The gravitational force will always be attractive, not repulsive. 
Weak nuclear can do both like electromagnetic force.

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A postitivly charged atom has? A.Lost electrons B. Lost protons C.Gained electrons D.Gained protons
Kipish [7]

Not to be too picky, but the question ought to say a positively charge ion rather than atom.

I will assume that is what you mean. An ion, using ordinary means, will be positive if it loses electrons (which are negative).

An ion can never gain protons. Left alone, the nucleus will remain unchanged for the rest of eternity. D is wrong.

C is wrong. If electrons are gained, the ion will go negative.

B is wrong for the same reason D is. An ion can't gain protons and it can't lose them.

A is the answer.

6 0
3 years ago
PLEASE HELP, 50 points!!!! what elements on the periodic table are helpful in some ways but still toxic?
timama [110]

Answer:

1. Polonium

2. Mercury

3. Arsenic

4. Francium

5. Lead

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5 0
3 years ago
Read 2 more answers
Question 10(Multiple Choice Worth 50 points
777dan777 [17]
Purchase inexpensive imported food increase single use items
7 0
2 years ago
Consider the DNA sequence. 5' C C G T A A C A G T C G A C G A G C A C A T A G C T T C A G C A T A C A G C A G A T A G 3' 3' G G
umka2103 [35]

Answer:

Primers should be:

3 'ACGTATGTCGCTTAGT 5'

5 'ACGTTCCAGTCAATGA 3'

Explanation:

DNA replication occurs with the need for the presence of primers that are a small sequence of nitrogenous bases that will allow the initiation of replication.

Primers are extremely important in PCR and are represented as small pieces of single-stranded DNA that specify the region of DNA that should be replicated during PCR. These primers attach to the single strand of DNA by pairing the nitrogenous bases allowing the DNA polymerase to recognize where replication begins.

Regarding the question above, the primers should be:

3 'ACGTATGTCGCTTAGT 5'

5 'ACGTTCCAGTCAATGA 3'

6 0
3 years ago
Ryland is setting up a cooler to store flowers for a big event. Which of the following is NOT going to contribute to ethylene bu
Bad White [126]

Answer:

Gas leaks

Explanation:

I don't know anything about biology but I know gas leaks aren't good for plants

6 0
3 years ago
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