Answer:
3.3m
Explanation:
Given parameters:
Frequency = 90Mhz
Unknown:
Wavelength = ?
Solution:
To find the wavelength, use the expression below;
V = f x wavelength
V is the speed of light = 3 x 10⁸m/s
f is the frequency
Now;
Insert the parameters
3 x 10⁸ = 90 x 10⁶ x wavelength
Wavelength =
= 3.3m
Answer: The threshold energy of the electrons in aluminium is 393.71 kJ/mol.
Explanation: Threshold energy is the minimum amount of energy which is required to emit a photon from a metal surface.
Mathematically,

Where,
E = Threshold energy
= Avogadro's constant = 
h = Planck's Constant = 
= Frequency of the particle =
Putting values in above equation, we get:

(Conversion Factor: 1kJ = 1000J)
Answer: Length, thickness, and temperature
Explanation:
I did it
Answer:
As mass increase acceleration decrease so the relationship is opposite
Water does not have a pH of 0, its actually 7. Also, it is not less dense than ice. Lastly, it does not dissolve in most substances, its the complete opposite. As its a solvent, not a solute.
Answer: B