Answer:
According to wavelengths in descending order: C, B, D, E and A
According to frequencies in descending order: A, E, D, B and C
According to speeds in vacuum: A =B =C =D =E
Explanation:
in the EM spectrum, radio waves have the longest wavelength while gamma rays have the shortest wavelength.
All EM waves travel with the same speed of 
in a vacuum.
If a photon has a wavelength of about 10^-10 meters, it would be certainly in the X rays region and it would have a frequency of 2.99792458x10^18 Hz, that you can easily calculate using the relation that states that the product of the wavelength and the frequency of an electromagnetic wave aka light is always equal to 299,792,458 m/s which is the exact value of the speed of light!
The potential energy:
E p = m · g · h
m = 25 kg, g = 9.81 m/s², h = 3 m
E p = 25 kg · 9.81 m/s² · 3 m = 735.75 J
Answer:
548800J
Explanation:
Given parameters:
Mass of roller coaster = 800kg
Height of hill = 70m
Unknown:
Change in potential energy = ?
Solution:
The change in potential energy is the difference between the potential energy at the bottom and at the top.
Potential energy at the bottom is 0J
So;
Change in potential energy = mgh - 0
m is the mass, g is the acceleration, h is the height
Change in potential energy = 800 x 9.8 x 70 = 548800J
