Answer:
pour the rock salt mixture throught a filter made from paper and allow the liquid to filtrate .
Explanation:
Separating Sand and Salt
Probably the easiest method to separate the two substances is to dissolve salt in water, pour the liquid away from the sand, and then evaporate the water to recover the salt.
Answer:
the AUTOmobile serves as a way for transport, for people to get from point A to point B, the first person to build the car would be the great Karl Benz, he is German and if you can guess he is known for the expensive high class car Mercedes Benz, the impact the car can be taken as good or bad, for one it influenced the industrial age, but on the other hand it caused alot of polution and waste and when waste, I mean cars sitting around in junkyards not being fixed and taking up space.
Explanation:
my sources are from everywhere and Im sure you could have found verified sources too
Here we have to choose the challenge which is faced by the scientist to make a hydrogen fuel cell by using water.
The challenge that the scientists are facing a. decomposition of water requires a high energy.
For the generation of fuel cells by hydrogen the use of water (H₂O) is a challenging task as the H-O bond in water is so strong and need high activation energy.
As per the mechanism of hydrogen fuel cell generation of H₂ is compulsory. Water remains in its solution as H₂O⇔H⁺ + OH⁻. The breaking of hydroxide ion (OH⁻) to form free hydrogen need a high energy, which cannot meet easily by any energy source.
The sun is always a renewable energy source as the energy of sun is infinitive.
The decomposition of water will only produce oxygen (O₂) and hydrogen (H₂) among which H₂ will be used in the fuel cell and O₂ is not at all harmful.
The excess O₂ is always good for the environment as it is the breathing source in the living system.
Mass is how much matter is in an object. Volume is how much space an object occupies. Density is the amount of mass in a volume.
Have a nice day, brainliest would be fantastic
Answer:A
Explanation:becuse they waste less heat energy
