A square block of steel with volume 10 cm3 and mass of 75 g is cut precisely in half. The density of the two smaller pieces is now...a. the same as the original density.
b. one-half the original density.
c. two times the original density.
d. one-fourth the original density.

Answers

Answer 1

Answer: a. Density only depends on the substance. It doesn't matter whether you have a little chip of it or a supertanker full of it ... the density doesn't change.

Answer 2

Answer:

Answer:

a. the same as the original density.

Explanation:

The density of a material depends only on the properties of the material, so if a block of steel is cut in a half, it is still made of the same material (steel), so it still has the same density.

We can verify it by doing some calculations. In fact, the initial density of the block of steel is given by the ratio between its mass (75 g) and its volume (10 cm^3):

$d=(m)/(V)=(75 g)/(10 cm^3)=7.5 g/cm^3$

When the block is cut in a half, its mass becomes half:

$m' = (m)/(2)=(75 g)/(2)=37.5 g$

and its volume also becomes half:

$V'=(V)/(2)=(10 cm^3)/(2)=5 cm^3$

So the new density is

$d'=(m')/(V')=(37.5 g)/(5 cm^3)=7.5 g/cm^3$

So, the density has not changed.

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Answers

Answer:

2.31×10-⁶ is scientic notaion of 0.00000231

Final answer:

The number 0.00000231 is written as 2.31 x 10^-6 in scientific notation. Scientific notation represents numbers as a mantissa (between 1 and 10) multiplied by 10 raised to an exponent.

Explanation:

The number 0.00000231 in scientific notation is written as 2.31 x 10-6. In scientific notation, a number is represented as a number between 1 and 10 (known as the mantissa) multiplied by 10 raised to a power (the exponent). In this case, 2.31 is your mantissa and -6 is your exponent. The negative exponent indicates that the original number was less than 1, and the 6 indicates how many places the decimal was moved to the right to obtain the mantissa.

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Answers

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Answers

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The gravitational force of gravity weighing 1 kg on Earth is 9.8 N. Another way to put that is the gravitational force on the Earth's surface is 9.8 N / kg.

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Answer:

The value 9.8 corresponds to g, the acceleration due to gravity in SI units.

Explanation:

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