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3 years ago

Using the rules for significant figures, what do you get when you multiply 67.6 by 1.2?

Physics

2 answers:

Natali [406]3 years ago

5 0

Answer:

B. 81

Explanation:

Answer: = 81 (real number)

Answer:= 8.1 × 101 ( In scientific notation)

Answer:= 8.1e1 (scientific e notation)

Rule: All the number before the power of 10 are considered as significant figures.

number of significant figures: 2

Paul [167]3 years ago

3 0

Answer:

B. 81

Explanation:

When you multiply two numbers, round the answer to the least number of significant figures available. 67.6 has three significant figures, and 1.2 has two significant figures. So we round to two significant figures.

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The plane of a rectangular coil, 3.7 cm by 3.7 cm, is perpendicular to the direction of a uniform magnetic field B. If the coil

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Explanation:

Given

Area of cross-section $=3.7\times 3.7 cm^2=13.69 cm^2$

N=no of turns=61

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emf induced $e=NA\frac{\mathrm{d} B}{\mathrm{d} t}$

$0.32=62\times 13.69\times 10^{-4}\times \frac{\mathrm{d} B}{\mathrm{d} t}$

$\frac{\mathrm{d} B}{\mathrm{d} t}=\frac{0.32\times 10^4}{848.78}=3.77 T/s$

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