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lisabon 2012 [21]
4 years ago
13

If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay:

Physics
1 answer:
DerKrebs [107]4 years ago
4 0

Answer:

Protons = 28

Neutrons = 42

Explanation:

Alpha decay is one of radioactive decay in which the atomic nuclei can be illustrated by the emission or loss of helium particles of mass number 4 and proton number of 2

Because mass number is the sum of protons and neutrons, If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay, 28 protons will be left in the nucleus and 42 neutrons will be left in the nucleus.

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Calculate the resultant force acting in the opposite directions:-<br><br><br><br> answer asap
kap26 [50]

Answer:

Magnitude of the resultant force will be 20N in the direction of F_2.

Explanation:

It's given in the question that two forces have been applied on the object given.

Since force is a vector quantity, therefore, it has magnitude and direction both.

F_1=20N

F_2=40N

Both the forces are in the opposite directions.

Therefore, magnitude of the resultant force of these forces will be,

F_2-F_1=40-20

            = 20 N

And the direction of the resultant force will be towards F_2.

Therefore, magnitude of the resultant force will be 20N in the direction of F_2.

3 0
3 years ago
A supplier wants to make a profit by buying metal by weight at one altitude and selling it at the same price per pound weight at
Veronika [31]

The correct option is C.

In physics, the gravitational law makes us to understand that gravity change with altitude. The higher the altitude, the more the gravity one will experiences. Change in altitude also produce change in weight but all these changes are not really significant. Therefore, there will be no significant difference between weighing metals at different altitude, this is because the effect of gravity on them will be the same.

3 0
3 years ago
Express the vector R<br> B<br> in terms of A, B, C, and Ď, the edges of a<br> parallelogram.
Vadim26 [7]

Answer:

R=0.5B+0.5C+2A+D

Explanation:

By the triangular law of vector addition

vector R= vector B- vector D

As A,B,C,D are edges of the parallelogram,

A is parallel to D but opposite in direction.

Therefore

A = (-D);A//D;

2A=-2D

B is parallel to C and in same direction.

B//C\\B=C\\

0.5B=0.5C\\

R= B-D;\\R= 0.5B+0.5B-D;\\R=0.5B+0.5C-D;\\R=0.5B+0.5C-2D+D;\\R=0.5B+0.5C+2A+D;

7 0
3 years ago
PLEASE HELP!!! When you lift a book from the ground to your desk, what kind of work do you do, negative or positive? By lifting
Snowcat [4.5K]

When someone lifts a book from the ground, the work you use is positive. By lifting the book, you change it's energy and it's original place The book gains, kinectic energy.


Hope I helped.

 

8 0
3 years ago
What is specific latent heat mean in simple word?​
Nuetrik [128]

Answer:

Amount of energy required to change the 1kg of a substance without changing its temperature.

7 0
2 years ago
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