The equation for percent error is
% Error =

Our experimental is 2.85g/cm^3 and the accepted is 2.7g/cm^3
Thus our % Error = 5.555%
F=ma
m=total mass = 2300kg+2500kg=4800
F=18000N
a=?
a=F/m
a=18000/4800
a=3.8m/s^2
Final answer
Explanation:
It is given that,
Power of EM waves, P = 1800 W
We need to find the intensity at a distance of 5 m. Also, the rms value of the electric field.
Intensity,

The formula that is used to find the rms value of the electric field is as follows :

c is speed of light and
is permittivity of free space
So,

Hence, this is the required solution.
Answer:
Red has the longest wavelength among all the visible colors of light.
Explanation:
Visible light is the only electromagnetic radiations which can be seen by human eye. When white visible light passes through a prism it breaks down into 7 distinctive colors of rainbow.
These are red, orange, yellow, green blue, indigo and violet.
Red has the longest wavelength of around 700 nano meters with violet has the shortest wavelength of 380 nano meters.