Answer:
Explanation:
As we know that
mass of the string is
length of the string is given as
now we can find the linear mass density of the string as
Now we know the frequency of the string wave as
now we have
Answer:
Magnetic force, from north to south.
Explanation:
It is given that,
Mass of the ball, m = 140 g = 0.14 kg
Number of electrons,
Height, h = 110 m
Charge, q = ne
Magnetic field, B = 0.3 T
The potential energy at height of 110 meters is balanced by the kinetic energy as per the law of conservation of energy as :
Magnetic force is given by :
F = q v B
As the direction of magnetic field is from east to west, so from right hand thumb rule the direction of magnetic force is from north to south. Hence, this is the required solution.
Technically, displacement is the "shortest" distance between any two points. If you say displacement is greater than distance, you will contradict the above statement. Displacement is always less than or equal to distance. Note that distance is a scalar whereas displacement is a vector. :)
These are characteristics of a wave. The amplitude is how high and low the waves go. Crests are high points on the wave, and troughs are low points on the wave.