Anyone know the answer to this question?

Physics

1 answer:

nikitadnepr [17]3 years ago

4 0

- The integers 1,2,3,4,5,6,7,8,9 are always significant

- Zeros in between numbers are always significant

Explanation:

The rules to determine whether a digit is significant or not are the following:

- All the non-zero digits are significant: 1,2,3,4,5,6,7,8,9

- The zeros between two non-zero numbers are always significant

- The zeros before non-zero numbers on the left of the decimal point are never significant

- The zeros given after a non-zero number on the right of the decimal point are significant if they provide information about the precision of the measure

So now let's analyze the statements given:

- The integers 1,2,3,4,5,6,7,8,9 are always significant --> true

- All numbers to the right of the decimal point are always significant --> false. For instance, in 0.012, only 1 and 2 are significant.

- Zeros to the left of a decimal point and in a number greater than or equal to 10 are always significant --> false. For instance, in 7200, the two zeros are not significant.

- All zeros are significant numbers --> false, as we saw in the previous examples

- Zeros in between numbers are alwasy significant --> true

Learn more about significant figures here:

brainly.com/question/5028090

#LearnwithBrainly

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A 3.00-kg box is sliding along a frictionless horizontal surface with a speed of 1.8 m/s when it encounters a spring. (a) Determ

aniked [119]

Answer:

a) k= 3594,7 N/m

b) v= 0.55 m/s

Explanation:

a)
As the surface is horizontal, the only change in energy will be the change in kinetic energy, as the box comes to an stop after compressing the spring.
As we know that the surface is frictionless also, this change in kinetic energy must be equal to the change in the elastic potential energy of the spring.
So we can write the following equality:

$\Delta K = \Delta U$