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3 years ago

Describe how to prepare a 10.0% w/v solution of salt in water in a 100 mL volumetric flask

1 answer:

6 0

To prepare a 10.0% w/v solution of salt in water in a 100 mL volumetric flask, first you must weigh 10 g of salt because the 10 % 100 is 10 and the given should be 10 % w/v. place the 10 g salt to the volumetric flask then add water up until to mark of the volumetric flask then shake it.

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A magnet has ___________ poles. Like poles__________each other and unlike poles __________. An electromagnet is used to separate

Stels [109]

Answer:

2 repel attracts light water

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3 years ago

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describe how a physical property, such as mass or texture, can change without causing a change in the substance

kari74 [83]

On the mass subject you could simply change the weight, on the texture subject you could smooth it out like polishing fresh wood, or you could change the color of water with a drink-mix packet. Hope it helped!

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3 years ago

The distance versus time graph for Object A and Object B are shown.

OverLord2011 [107]

Answer:

<em>Answer: Both move with constant speed.</em>

Explanation:

<u>Constant Speed Motion </u>

When an object moves in such a way that it travels the same distances at the same times, we can say its speed is constant. For example, if it travels x=10 m in t=2 seconds and later it travels x=20 m in t=4 seconds, its speed is constant and equal to v=5 m/s. The relation between the variables x,t, and v is

x=v.t

Note that the relation between x and t is v, a constant value, thus the graph x-t is a line.

The question describes two graphs, for Object A and Object B respectively, and both of the descriptions correspond to lines. We don't have much information about the characteristics of the lines, but we can be sure, according to the definitions stated above, that both objects are traveling at a constant speed.

Answer: Both move with constant speed.

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3 years ago

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A 1.83 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.442 and t

fredd [130]

Answer:7.92 N

Explanation:

Given

mass of book $m=1.83\ kg$

coefficient of static friction $\mu _s=0.442$

coefficient of kinetic friction $\mu _k=0.240$

To move the book, one need to overcome the static friction

Static friction $F_s=\mu _sN$

$F_s=\mu _s\times 1.83\times 9.8$

$F_s=0.442\times 1.83\times 9.8$

$F_s=7.92\ N$

After overcoming the Static friction , Force needed to move the block is

$F_k=\mu _kN$

$F_k=0.240\times 1.83\times 9.8$

$F_k=4.30\ N$

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3 years ago

Describe how mathematics and science are related?

Sphinxa [80]

There are three subjects in Science
Biology
Physics
Chemistry
You need some maths skills to calculate formulas. Most of the problems will require at least a little bit of math skills to be answered in the right way.
I hope i have helped you!

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3 years ago