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SCORPION-xisa [38]
4 years ago
12

Help with a and b? I don't understand how to do it

Physics
1 answer:
ZanzabumX [31]4 years ago
5 0
A).  If the half-life is 40 days, then 5 half-lives = (5 x 40) days.

b).  If 5 half-lives have passed, then the radioactive portion of
the sample has been cut in half five times.

The amount that remains is  (1/2)⁵ of the original amount.

That's (the original amount) x (1/2 · 1/2 · 1/2 · 1/2 · 1/2)
or
           (the original amount) / 2⁵
or
           (the original amount) / 32 .
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How does Newton's second law of motion gives the measurement of force?
Alex Ar [27]
Hi pupil here's your answer ::

_____________________________

How does Newton's second law of motion gives the measurement of force?
So the answer is first : what is newton's second law? =》The rate of change of momentum of an object is equivalent to particular direction of the FORCE
=> This is how Newton's second law of motion gives the measurement of FORCE .

=>It gives measurement as the equation
》 F=MA《
Where F is force , M is mass of the object , and A is the acceleration produced .

_____________________________

hope that it helps. . . . . .
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Answer: B. energy

Explanation:

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How did Aristotle contribute to science?
Nimfa-mama [501]
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3 0
3 years ago
Which best explains how an object at rest deep in space and far from any massive body behaves compared to an object in free fall
7nadin3 [17]

Answer: They behave the same because, according to the principle of equivalence, the laws of physics work the same in all frames of reference.

Explanation:

According to the equivalence principle postulated by Einstein's Theory of General Relativity, acceleration in space and gravity on Earth have the same effects on objects.

To understand it better, regarding to the equivalence principle, Einstein formulated the following:  

A gravitational force and an acceleration in the opposite direction are equivalent, both have indistinguishable effects.  Because the laws of physics must be accomplished in all frames of reference.

Hence, according to general relativity, gravitational force and acceleration in the opposite direction (an object in free fall, for example) have the same effect.  This makes sense if we deal with gravity not as a mysterious atractive force but as a geometric effect of matter on spacetime that causes its deformation.

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