If an atom contains 12 protons and 10 neutrons, what's its mass number?
A. 22
B. 10
C. 12
D. 2

A. 22
12 +10 = 22
Mass number = Number of protons + Number of neutrons

Expert answered|vjmeneses01|Points 126|

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Asked 10/5/2013 11:45:24 PM

Updated 8/3/2014 4:40:14 PM

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What's the net force acting on an 18-kg object if an acceleration of 3.0 m/s2 is produced?
A. 6 N
B. 36 N
C. 12 N
D. 54 N

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Not Answered

Updated 9/29/2013 2:00:40 PM

5 Answers/Comments

Answer D.

The Formula used is F = ma where:

F is the net force in N,

m is the mass of an object in kg and

a is its acceleration in m/s2.

The Formula used is F = ma where:

F is the net force in N,

m is the mass of an object in kg and

a is its acceleration in m/s2.

Added 9/29/2013 12:42:59 PM

Yes. 54N is the correct answer.

Added 9/29/2013 1:16:45 PM

This answer has been flagged as incorrect.

Rated good by whalenutz198st, Flagged by andrewpallarca

erikalui, please make sure that you indicate the complete answer not just the letter. It is also important to show the solutions.

Added 9/29/2013 2:00:40 PM

What's the net force acting on an 18-kg object if an acceleration of 3.0 m/s2 is produced?
A. 6 N
B. 36 N
C. 12 N
D. 54 N
**Weegy:** The net force acting on an 18-kg object if an acceleration of 3.0 m/s2 is: 54 N.
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Asked 9/29/2013 1:11:03 PM

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What's the speed of a sound wave through water at 25° Celsius?
A. 1,500 m/s
B. 750 m/s
C. 1,250 m/s
D. 1,000 m/s
**Weegy:** Answer is A. In fresh water, a sound wave travels at about 1,500 m/s at 25° Celsius.
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Asked 9/29/2013 7:13:23 PM

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In a controlled experiment, the factor tested is called the
A. dependent variable.
B. constant.
C. control.
D. independent variable.
**Weegy:** In a controlled experiment, the factor tested is called the independent variable. (More)

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Expert Answered

Asked 9/29/2013 7:20:03 PM

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In a controlled experiment, the factor tested is called the
A. dependent variable.
B. constant.
C. control.
D. independent variable.
**Weegy:** In a controlled experiment, the factor tested is called the independent variable.
(More)

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Asked 9/29/2013 7:22:32 PM

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