Question

22 multiple answer 1 point which choices below show incorrect scientific notation? 57×10^(-15) 1.3×10^(-5) 0.23×10^(15) 9.43×10^(6) 23 numeric 1 point how many significant figures are in 400 kg? answer 1 24 multiple choice 1 point which of the following explains why liquids can flow and solids cannot? solids weigh more than liquids and gases.

Explanation:

Question 22

Step1: Recall scientific - notation rule

Scientific notation is of the form $a\times10^{n}$, where $1\leq|a|\lt10$ and $n$ is an integer.

Step2: Check each option

For $57\times10^{- 15}$, $a = 57$ which is not in the range $1\leq|a|\lt10$. It should be $5.7\times10^{-14}$.
For $1.3\times10^{-5}$, $a = 1.3$ and $n=-5$, it is in correct scientific - notation.
For $0.23\times10^{15}$, $a = 0.23$ which is not in the range $1\leq|a|\lt10$. It should be $2.3\times10^{14}$.
For $9.43\times10^{6}$, $a = 9.43$ and $n = 6$, it is in correct scientific - notation.

When there are trailing zeros in a number without a decimal point, the zeros may or may not be significant. In the number 400, the zeros are not considered significant as there is no decimal point to indicate their significance. So, the number of significant figures is 1.

The ability of liquids to flow and solids not to flow is related to the intermolecular forces and the arrangement of particles. In liquids, the intermolecular forces are weaker than in solids, and the particles are more free to move past one another. Solids have strong intermolecular forces that hold the particles in a fixed position. The weight of the state (solid, liquid, gas) is not the determining factor for the flow - ability. And the size of particles is not the main reason for the flow - ability difference between solids and liquids.

Answer:

A. $57\times10^{-15}$, C. $0.23\times10^{15}$

Question 23