Answer:
Explanation:
one is True, an electro magnet is only magnetic because of current producing the magnetic field.
I think is a theory I am not sure
Answer:
Purity, power, and selflessness are all symbols associated with the flower. They aspire to lead the entire human species along the noble road. The receiver feels calmed and uplifted by the sight of lovely fresh flowers, which is why they have had a particular position in human history from ancient times.
Answer:
pH>7
sour taste
donate H+ ions
turn litmus paper from blue to red
Explanation:
(For a bit of context I will use the reaction between HCl and Mg as an example)
The larger the surface area of the magnesium metal, the more particles are exposed to collide with the aqueous HCl particles to cause the reaction to occur. This increases the frequency per second of collisions, speeding up the rate of reaction.
The effect of a catalyst is to reduce the minimum collision energy which allows the reaction to happen. This does not increase the number of collisions per second, but increases the percentage of successful collisions, which consequently causes the rate of reaction to increase .
I have drawn diagrams showing the effect of surface area, but there isn't really a meaningful diagram that I know of to show the impact of a catalyst (at least not at GCSE level).