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alexira [117]
4 years ago
6

What is mass number

Physics
2 answers:
Mazyrski [523]4 years ago
6 0

Answer:

the total number of protons and neutrons in an atom

laila [671]4 years ago
4 0

Answer:

the number of protons and neutrons together make up the mass number of am element

hope it helps you

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The graph shows projected changes in the populations of the world.
malfutka [58]

Answer: C. Africa

Explanation:

The data given on the graph shows that:

Asia will grow from around 1,300 million to 5,000 million in 2050 which is an increase of:

= 5,000 /1,300 = 3.84 times

Europe will decrease over that period.

Africa will go from around 300 million to 2,000 million which is an increase of:

= 2,000 / 300

= 6.67 times

Mexico

, Central America, Caribbean Islands:

= 900 / 120

= 7.5 times

United States,  Canada, and Greenland:

= 400/120

= 3.33

Oceania:

= 50 / 13

= 3.85

From the options give, Africa will see the greatest increase at 6.67 times its population in 1950.

3 0
3 years ago
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Which change will always result in an increase in the gravitational force between two objects? increasing the masses of the obje
abruzzese [7]

By definition, we have that the gravitational force is given by:

F = \frac{G * m1 * m2}{r ^ 2}

Where,

G: gravitational constant

m1: mass of object number 1

m2: mass of object number 2

r: distance between both objects.

Therefore, for the gravitational force to increase, the following conditions must be met:

1) Increase the mass of the objects so that the numerator of the equation is greater.

2) Decrease the distance between the objects so that the denominator of the equation is smaller.

Answer:

A change that will always result in an increase in the gravitational force between two objects is:

increasing the masses of the objects and decreasing the distance between the objects

4 0
3 years ago
Read 2 more answers
I need help with this.
madreJ [45]

Answer:

A.The new discovery might cause the theory to be dismissed since it contradicts it.

Or

D.The new discovery might further deny the theory since it presents evidence that contradicts it.

Itl be hard for them to decide you know, since this bigbang theory by darwin is widespread and cant be easily opposed..

_Askmeanything2♡

4 0
3 years ago
An 80 kg skateboarder moving at 3 m/s pushes off with her back foot to move faster.
Dmitry [639]

Answer:

640 J

640 J

Explanation:

ΔKE = ½ mv² − ½ mu²

ΔKE = ½ m (v² − u²)

ΔKE = ½ (80 kg) ((5 m/s)² − (3 m/s)²)

ΔKE = 640 J

Work = ΔE

Work = 640 J

5 0
4 years ago
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What happens when a sound wave passes from water to air?
s344n2d4d5 [400]
It slows down. The molecules/particles aren't as close together, resulting in slower movement.
4 0
3 years ago
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