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SSSSS [86.1K]
3 years ago
14

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 final velocity of the block A will be 2.5 m/sec. The principal of the momentum conversation is used in the given problem.

<h3>What is the law of conservation of momentum?</h3>

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

In a given concern, mass m₁ is M, mass m₂ is 3M. Initial speed for the mass m₁ and  m₂ will be u₁=5 and u₂=0 m/s respectively,

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The velocity of block A is found as;

\rm V_f=\frac{(m_1-m_2)u_1}{m_1+m_2} +\frac{2m_2u_2}{m_1+m_2} \\\\  V_f=\frac{(M-3M)5+2\times3M\times0}{m_1+m_2} \\\\ V_f=2.5 m/s

Hence, the final velocity of the block A will be 2.5 m/sec.

To learn more about the law of conservation of momentum, refer;

brainly.com/question/1113396

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That makes the answer letter D you provided above.

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Another example would be trying to put out a fire with a bucket of water. Usually, you can put out the fire debating on the size!

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effort is the answer

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