Answer: 1.59 sec
Explanation:
The kinetic energy contained in the rotation of the cylinder is 1/2 m v^2
The kinetic energy of translation is also 1/2 m v^2
so the total energy is m v^2
The force applied is mg sin (theta)
= m x 9.8 x 1/2
= 4.9 m
Now equate
F x d = m v^2
4.9 m x 3.1 = m v^2
v^2 = 4.9 x 3.1
v = sqrt(4.9 x 3.1) = 3.9 m/s
Acceleration.
V^2 = 2 a s
4.9 x 3.1 = 2 x a x 3.1
4.9 = 2 a
a = 2.45 m/s^2
Time
T = v/a
= 3.9/2.45
= 1.59 sec
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Answer:
The induced emf is 
Explanation:
From the question we are told that
The number of turn is 
The diameter of the coil is 
The uniform magnetic at initial is 
The uniform magnetic at initial is 
The time taken is 
The angle the magnetic field makes with vertical is 
Generally induced emf is mathematically represented as
where 
is the change magnetic flux
Magnetic flux is mathematically represented as
Substituting this above
Where B is the magnetic field and A is the area which is mathematically evaluated as
Substituting values
From the equation of emf
dB = 
So
substituting values
A. the medium
For refraction to occur, there has to be change from one medium to another. For example rays of light would refract as the travel from air to water.
Answer:
the correct answer is B
Explanation:
The kinetic model of the movement describes that the movement of the molecules increases with the increase of their internal energy, which in a macroscopic sample is reflected in an increase in the temperature of the sample.
The sample graph shows the function of temperature over time, which is why our kinetic model establishes that there is an increase in the movement of water molecules.
Consequently the correct answer is B
