Answer:
Explanation:
A physical change is a change in which the physical properties of matter are altered. These are properties are the forms and state.
Most physical changes are easily reversible and are pure state changes.
They do not lead to the production of new compounds.
They involve no mass change and requires little to no energy.
Examples are melting, boiling, freezing, sublimation e.t.c
It provides the electric current, i.e. the positive and negative charges across the cell
Explanation:
It is given that peak (maximum) emission of star is 300 nm.
And, it is known that according to Wein's displacement relation between wavelength and temperature is as follows.
= 2898 micrometer.K
Hence, putting the given values into the above formula as follows.
= 2898 micrometer.K
= 2898 \times 10^{-6} meter.K
T = K
= 9660 K
Thus, we can conclude that the estimated surface temperature of star is 9660 K.
Answer:
By losing an electron
Explanation:
Electrons have a negative charge. So, losing one would give an element a more positive charge. You can usually find a hydrogen ion (H+) in substances like acids.