What are the key differences between dependent and independent variables? *

Answers

Answer 1

Answer: Dependent variables are essentially what you are measuring and is kept the same, and the independent variable is what you change in the experiment

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A baker touches a pie right after taking it out of the oven. Which statement best explains why the pie feels hot?

Answers

The pie is going to be hot right when it comes out of the oven because the oven uses air to transfer heat. The air warms at the bottom of the oven and the air rises to the top of the oven where your food is. This is why any food is going to be hot right after you take it out of an oven.

Answer:

Molecules in the pie move faster than molecules in the skin, so heat is transferred to the skin.

Explanation:

What terms are needed to completely describe velocity... A.units

B.number

C.mass

D.direction

Answers

a, b, and d. mass could be important in your calculations though.

Carbonic acid dissolves limestone and other rocks. This is an example of _____. chemical errosion

Answers

Carbonic acid dissolves limestone and other rocks. This is an example of chemical erosion. An example is in the caves. Caves are formed where rainwater as it falls through the atmosphere absorbs carbon dioxide. The carbon dioxide makes the rain acidic to react it with the limestone bedrock. The rainwater is absorbed by the soil into the ground. Then as it enters through the soil, the rainwater will absorb more carbon dioxide that is produced by the decomposers. The carbon dioxide with water reacts to form carbonic acid. The carbonic acid will react to limestone and dissolves it slowly. As the space become larger, water can enter into it.

Answer:

chemical errosion

Explanation:

Which mixture will not yield hydrogen gas? (A) sodium and water
(B) calcium and water
(C) zinc and hydrochloric acid
(D) zinc and concentrated nitric acid
(E) steam and red hot iron

Answers

E) Steam and red hot iron

The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay?I'm not quite sure how to set it up to even start working it? help would be appreciated! Thanks!!

Answers

t½=18.72days
therefore t¾=18.72+½ of 18.72
we have 18.72+9.36=28.08days

Which of the following can be used to neutralize an ammonia (NH3) solution?

Answers

It really depends on your options.
Since NH3 solution is a weak base, the option that neutralizes a base is an acid. So find an acid among your options, and here are some examples: HNO3, HCl, etc.

It would have been much better if you had attached some options to choose. But I think I've got what you mean. I bet that solution is HCl.

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