Answer:
The answer is 631.157
Explanation:
The question requested that the answer to the subtraction of 26.543 from 657.70 must be written using significant figures.
Here are a few tips about how to Identify significant figures.
1) It should be noted that <u>the number "0" is what is usually (but not always) affected</u> while trying to identify significant figures. Hence, <u>all other numbers/digits are always significant</u>. For example, 26.543 has five significant figures.
2) The zeros found between these "other numbers/digits" are also significant. For example, 2202 has four significant figures.
3) In the case of a decimal, the tailing zeros or the final zero is also significant. 657.70 and 657.07 have five significant figures.
Now, back to the question
657.70 - 26.543 = 631.157.
Our final answer does not have a zero, hence all the digits (six) are significant.
Chemical energy .........
The critical mass of a fissionable material depends upon its nuclear properties (specifically, the nuclear fission cross-section), its density, its shape, its enrichment, its purity, its temperature and its surroundings.
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Answer:
Orsted found that the needle of a compass could be redirected if placed near a wire carrying current. This illustrated a fundamental physics finding that a <u>magnetic field exerts a force on a charge.</u>
Explanation:
In the Orsted's experiment he placed a magnetized needle next to a conductor through which an electric current was circulating. Incredibly, the needle deviated, evidencing the presence of a magnetic field. The conclusion was that electric currents generate magnetic fields, thus demonstrating the relationship between electric currents and magnetic fields, , which can exert a force on a charge.
Answer:
Explanation:
The potential energy associated with a body (m) located at a given height (h) above a reference point is defined as:
At the reference point the potential energy is zero. In this case the body is below the reference point (the ceiling), therefore, the value of h is negative:
