Answer:
Stars live to long to be observed from birth to death
Explanation:
The life expectancy of a star are millions of years compared to that of human thereby making it difficult to study the life path and activities of the stars till the point of extinction. This brought about scientist studying different star with different ages in order to answer their burning question on formation of stars which is called the figuring out process(stellar activity) and this makes it difficult and tedious.
Answer:
By induction method
Explanation:
Induction method involves charging an electrically neutral body by bringing it in contact with an electrically charged body.
For the electrophus, a charge opposite that on the slab is induced on the side in contact with the slab; driving the opposite charge (this will be the same as that on the slab) to the other end of the elctrophus. Touching the electrophus removes the charge opposite the charge induced on the electrophus by the charged slab either by drawing up charge from the earth or taking the charge to earth (depends on the charge. A negative charge is drawn to earth while a positive charge draws up electrons from the earth)
Answer:
Rate of change of magnetic flux
Explanation:
The induced current is equal to the ratio of induced emf to the resistance of the conductor.
According to the Faraday's law of electromagnetic induction, the induced emf is proportional to the rate of change of magnetic flux.
Almost all methods of generating electricity depend on using
some other form of energy to spin an electrical generator.
If the other form of energy is kinetic energy robbed from wind,
then the wind turns the blades of a big 'fan', and the blades
spin the electrical generator.
In a commercial windmill, the electrical generator is in that 'box'
on top of the pole, right behind the hub of the blades.
The washing up liquid turns blue because pH of liquid is greater than 7.
<h3>What is pH?</h3>
pH is a measures how much water is acidic/basic in nature. The range o pH is 0 - 14. The pH value of 7 represents neutral. pH less than 7 is acidic nature. pH greater than 7 shows a base.
Sharna mixed cabbage water with colourless washing up liquid, the mixture turned blue.
Cabbage contains anthocyanin which changes color when it is mixed with an acid or a base. The pigment turns bluish-green in a pH greater than 7.
Thus, The washing up liquid turns blue because pH of liquid is greater than 7.
Learn more about pH.
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