Answer:
The correct answers are "A magnetic field is the area around a magnet where a force is exerted on certain objects", "Magnetic field lines spread out of the north end of the magnet" and "Magnetic fields are three-dimensional and resemble a bubble".
Explanation:
Three statements that define a magnetic field are:
1. "A magnetic field is the area around a magnet where a force is exerted on certain objects". Magnetic field force is driven by moving electric charges and the objects that are susceptible to the forces are known as electromagnetic objects.
2."Magnetic field lines spread out of the north end of the magnet". Magnetic fields are taken to be outward from the North pole to the South Pole. This direction takes place on Earth as well, because Earth function as a giant magnet.
3. "Magnetic fields are three-dimensional and resemble a bubble". Magnetic field forces are driven following a bubble like configuration and affects the objects upon this configuration.
Answer:
Guys the answer is "A", "D", and "E"
Explanation:
I don't know why you guys gave the guy above me a bad rating, give him 5 stars people, he is also right.
Have a Jocular Day
B. Ribosomes
C. Mitochondria
The answer is B
Ribosomes
B. by decreasing the pressure of a chemical reaction
C. by increasing the concentration of reactants in a reaction
D. by decreasing the activation energy of a reaction
Answer: D) By decreasing the activation energy of a reaction
A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.
Catalyst provide an alternative reaction pathway that has lower activation energy than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.
A catalyst works by decreasing the activation energy of a reaction, providing an alternative pathway for the reaction to occur with lower energy barriers. Therefore, the correct answer is option is d.
A catalyst works by D. by decreasing the activation energy of a reaction.
A catalyst is a substance that speeds up a chemical reaction without itself being consumed or permanently changed in the process. It achieves this by providing an alternative reaction pathway with a lower activation energy. The activation energy is the minimum amount of energy required for a reaction to occur.
Here's how it works:
In a chemical reaction, reactant molecules need to overcome an energy barrier, represented by the activation energy, to transform into products.
Catalysts provide an alternative route for the reaction that has a lower activation energy. This lower activation energy pathway is often referred to as the catalyzed pathway.
By reducing the activation energy, the catalyst allows more reactant molecules to possess the required energy to overcome the barrier and react, thus increasing the reaction rate.
Importantly, the catalyst itself remains unchanged at the end of the reaction and can be used repeatedly for other reactions.
In summary, a catalyst facilitates a chemical reaction by lowering the activation energy required for the reaction to proceed, making it easier for reactant molecules to convert into products and increasing the reaction rate.
Therefore, the correct answer is option is d.
Learn more about How a catalyst works here:
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