I have three questions if you don't mind, please help me.
1)As the frequency of EM waves increases, what happens to the energy carried by the waves?
a)Increases
b)Decreases
c)It stays the same
d)It depends on the type of radiation
2) Where does EM radiation come from?
a)The sun
b)The moon
c) The earth
d) Scientists aren't sure
3)Consider the EM spectrum. What is the relationship between wavelength and frequency?
a)Frequency changes while wavelength stays the same
b)As one increases, the other decreases
c)There is no relationship
d)Wavelength changes while frequency stays the same
Thanks

a, a, b

Explanation: Energy increase as frequency grows on the ems, almost all radiation comes from the sun, wavelengths get smaller as frequency grows

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !