Answer:
Explanation:
If we draw a free body diagram of the crate we will have the following related to the net force in the y-axis:
(1)
Hence:
(2)
Where:
is the normal force
is the weight of the crate
is the angle of the inclined plane where the crate is
Findind :
(3)
(4)
Finally:
Answer:
The correct answer is Joseph Stalin.
Explanation:
Joseph Vissarionovich Stalin was a Soviet politician who led the soviet union from 1929 - 1953. Stalin self declared himself as the dictator by 1930s. He was the person behind the Great Purge or "Great Terror" in which around a million were imprisoned and some 750,000 were executed. This campaign was led just to execute all those who were a threat to his party.
Answer:
14178 N
Explanation:
5560 Kg * 2.55m/s^2 = 14178 Newtons (Kg*m/s^2)
Answer::l=V/f
= 331/680= 0.48m
Explanation: if that isnt an option, round up to 0.5, thats what i had to do
Answer:
beam balance
Explanation:
A beam balance compares the sample mass with a standard reference mass
b. no disturbance
c. softer noises
d. no sounds
When constructive interference occurs in sound waves, it will causelouder beats. The answer is letter A. This is because the waves of the samefrequency travel in the same direction. This enables the waves to add up havingthe same frequency and direction but with greater amplitude.
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.