too small to be seen with an optical microscope
An electron microscope is usually used for microorganisms that are too small to be seen with the unaided eye. You can adjust the size of the microorganism to see it more clearly by adjusting its magnification lens.
B. Interference is observed with light.
C. Diffraction is observed with light.
D. Unlike sound, light waves don't need a medium to self-propagate
The correct answer to the question is : D) Unlike sound, light waves don't need a medium to self-propagate
EXPLANATION:
Before coming into any conclusion, first we have to understand the nature of sound and light.
A sound wave is a longitudinal wave which requires a medium for its propagation. It can not move in space as space contains no material medium for its propagation.
Light is normally considered as electromagnetic wave which does not require any medium for its propagation. It can travel in space also.
The interference and diffraction can not be explained by the particle nature of light.
Hence, the argument that partially support that light behaves just like a particle is the last statement i.e Unlike sound, light waves do not need a medium to self-propagate.
B.It equals zero.
C.It increases.
D.It decreases.
Answer:
The car's acceleration is: a = 12.44 [m/s²]
Explanation:
To solve this problem we must use the following equation of kinematics.
where:
Vf = final velocity = 62.2 [m/s]
Vo = initial velocity = 0 (because the car stars from the rest)
a = acceleration [m/s²]
t = time = 5 [s]
62.2 = 0 + a*5
a = 12.44 [m/s²]