CHEMISTRY MIDDLE SCHOOL

Which of the following does a simple circuit require?A. an energy source, a resistor, and a capacitor
B. a load, a conductor, and a resistor
C. a load, a resistor, and a capacitor
D. an energy source, a load, and a conductor

Answers

Answer 1
Answer: Ln h ch hc kh ñm ln oj
Answer 2
Answer:

Answer:

I think its a i dont know but ya A

Explanation:

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Which of the following processes are physical changes?a) drying wet clothesb) lighting a match from a matchbookc) cutting snowflakes out of paperd) melting butter for popcorn
Can anyone please help answer this chemistry question?
a book with a mass of 1 kg is dropped from a height of 3 m. what is the potential energy of the book when it reaches the floor?
Asexual organisms, as compared to sexual organisms, tend to be smaller, have shorter life spans, and produce little or no genetic variability between generations. This makes it harder for an individual asexual organism to survive and reproduce. What is one advantage that asexual organisms have that helps them to overcome these disadvantages?They never need to sleep.A They are able to find food easier.B They have higher reproductive rates.C They use energy more efficiently.

What property of a solution is the same before and after it is diluted?A. amount of solute
B. total volume
C. amount of solvent
D. concentration

Answers

Answer

A) amount of solute

Explanation

Dilution is adding more solvent to a solution to decrease the concentration of solute in a solution. The amount of solute does not change although the concentration, amount of solvent and the total volume does change.

An example of this would be adding more water (solvent) to lemonade to decrease the concentration of lemon juice (solute). Obviously this would increase the total volume because you are adding more water to the solution.

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How much energy is wasted as heat by an incandescent light globe

Answers

Electric current passes through a filament of an incandescent bulb, thereby increasing it temperature. When current flows, it contains electrons through the filament to produce light. Typically, incandescent light bulb consists of a glass enclosure that contains tungsten filament. The glass enclosure contains either a vacuum or an inert gas that serves as the filament protection from evaporating. Incandescent light bulbs contain a stem attached at to its base to allow the electrical contacts to run through the envelope without gas or air leaks. 

C. What are the characteristics of an old river?

Answers

Answer:

Explanation:

An old river occurs at the plain course and it is at its lower stage.

Here:

  1. The river gradient is very gentle as it is on a plain.
  2. An old river would be at its depositional phase where all the sediments its carries are being laid down.
  3. It has a low velocity and a very sluggish flow.
  4. Lateral erosion is very active at this stage.
  5. The volume of the river increases substantially as more river tributaries joins.
  6. Some of the river features are flood plains, leeves, ox-bow lakes, delta e.tc.

What will happened to the rock cycle without the erosion

Answers

If erosion did not occur series of rock formations will not occur or will be non-existent. This just means that the Earth will remain stuck in its original composition which in turn will hamper the rate of evolution. Without erosion, mountains will not be built, sea beds will not rise, new land forms will not be created, and ultimately the cycle of life would be in chaos. Erosion is the process of weathering of rocks that occur through time, it is a major contributor into the constant process of change that the environment goes through. Without it, Earth would become a barren desolate place that will not be capable to sustain life.

Answer: If erosion did not occur, no rock cycle would happen. It would end up having large amounts of igneous, metamorphic and sedimentary rocks. No finer rocks can be found and no flat lands can be seen.

Explanation:

If an orange is orange, why isn't a lime called a green or a lemon called a yellow?

Answers

A lime is called a lime because it's lime in colour and a lemon is called lemon because it's lemon in colour. Just to change the subject slightly why is a fly called a fly? - because it flies - so if a fly didn't have wings would it be called a walk. We could go on and on with this couldn't we and have a lot of fun too :)

Scientific discoveries are rarely used in technology.


True or False

Answers