Answer:
145.91 m
Explanation:
Data provided in the the question:
Wavelength of radio wave, 
Here, c is speed of radio wave in air = 3 × 10⁸ m/s
f is the frequency = 514 kHz = 514 × 10³ Hz
Thus,
Wavelength = (3 × 10⁸) ÷ (514 × 10³) m
or
Wavelength = 583.65 m
Thus,
The height of the antenna will be
= 
= 583.65 ÷ 4 m
= 145.91 m
The mass lost in the nuclear reaction is all converted to energy.
Answer:
The new radius is three times the initial radius
Explanation:
The magnetic force is given by the equation
F = q v x B
Where the blacks indicate vectors, q is the electric charge, v the velocity of the particle and B the magnetic field. The scalar magnitude of this force is
F = q v B sin θ
Where θ is the angle between the velocity and the magnetic field.
As the force is perpendicular to the velocity, the particle describes a circular motion, using Newton's second law we can find the acceleration that is centripetal.
F = ma
a = v² / r
q v B = mv² / r
R = mv / qB
Let's calculate for the new speed (v₂ = 3v)
R₂ = (m / qB) 3v
R₂ = 3 R
R₂ / R = 3
The new radius is three times the initial radius
Answer: spectroscopy
Spectroscopy is the separation of the light in the different wavelengths and spectrophotometry measures the intensities of the different components of the light to get the composition of substances.
