Which of the following would be and example of an independent variable

Answers

Answer 1
Answer:

An independent variable is something that will occur without something else happening.  An example of an independent variable is when your income depends on the number of sales.  In this situation, your income depends on how many sales you make, so therefore, the number of sales you make is the independent variable.


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Similar organisms that are not related are an example of A.  Natural selection B. Convergent evolution  C. Divergent evolution  D. Common ancestor

Humans have developed different cat breeds using the process of selective breeding. How is selective breeding different than evolution by natural selection?

A.
Selective breeding is driven by the environment, but natural selection is driven by humans.

B.
Selective breeding is driven by humans, while natural selection is driven by the environment.

C.
Selective breeding selects for favorable traits, but natural selection does not.

D.
Natural selection selects for favorable traits, but selective breeding does not.

Answers

"B. Selective breeding is driven by humans, while natural selection is driven by the environment" is true. Favorable traits are selected in both cases, but for different reasons.
Humans have developed different cat breeds using the process of selective breeding? B. Selective breeding is driven by humans, while natural selection is driven by the environment.
Hope I helped, and good luck!

If molarity = moles liter , then how many grams of NaCl are needed to make 1 liter of a 0.1 M solution? A) 0.0584 g NaCl B) 3.246 g NaCl C) 5.844 g NaCl D) 58.44 g NaCl

Answers

 The grams  of NaCl   that needed  to make 1L  of a 0.1 M solution  is  

5.845 g (answer C)

 calculation

Step 1: find the  moles of NaCl

moles  = molarity  x  volume  in liters

molarity = 0.1 M =0.1 mol/l

= 1 L x 0.1 Mol/L = 0.1 moles


Step 2: find  the   mass  NaCl

mass =  moles x  molar mass

From  periodic  table   the molar mass of NaCl  = 23 +35.45 =58.45 g/mol

mass= 0.1 moles  x 58.45 g/mol =5.845 g appropriate ( answer C)


Answer : Option C) 5.844 g NaCl

Explanation :

To calculate the number of grams of NaCl that would be needed to make 0.1 M of solution we have to calculate;

  1. The molecular weight of sodium chloride (NaCl) which is 58.44 g, so one gram molecular weight will be= 1 mole which is 58.44 g.
  2. By dissolving 58.44 g of NaCl upto the final volume of 1 litre, one can get 1 M NaCl solution.
  3. So, to make 0.1 M NaCl solution we have to dilute the mass of salt to 1000 ml of solution as follows;
  4. 0.1 M NaCl solution will require 0.1 x 58.44 g of NaCl = 5.844 g. of NaCl.

Which of the following is true for a reliable scientific source

Answers

Answer:

As the options for the question not given, lets try to answer this question generally.

Explanation:

A reliable source can be described as an authentic source which proves or declines an action, research etc.

The most reliable source for scientific information is scientific papers. This is because scientific papers are subjected to peer- review and hence been tested and validated. A peer-review can be described as a judgement or test made by a person on other peoples research, both of the people having equal caliber.

Answer:

It cites valid data because a reliable scientific source needs data to back up what they’re proving.

Explanation:

Which is a difference between global and local winds?

Answers

Explanation:

local winds are considered breezes while global winds produce mostly storms

Answer:

Global winds blow over long distances while local wind blows over short distances

Explanation:

Whats is a chemical change of a paper bag

Answers

Burning it. That causes a chemical reaction. 
Combustion will cause a chemical change in paper.

This is because the carbon compounds are being oxidized into carbon dioxide and water vapour (or h2o, same thing).



If an object has more negative charges than positive charges, the object has an overall

Answers

The object has an overall negative charge.
It will have an overall negative charge.