Radiowaves are electromagnetic waves and don't need a medium to travel through so B
The above given sentence is true reason being the use of Technology.
Explanation:
The basic purpose double technology is to make hard work easier and help in meeting the needs. Technology was being developed and is being upgraded so as to make some of the tasks, which were harder to do without it, easier.
Development of Technology has made the work easier and the needs are being met with an additional profit of saving time.
Answer:
a comet would go faster
Explanation:
the comet is being slingshotted by the suns immense gravitational pull
Answer:0.667 N
Explanation:
Given
It is noticed that Frictional Force is 0.2 N
Coefficient of kinetic Friction 
We know Friction Force is given by

therefore




Explanation:
It is given that,
Wavelength of a beam of light in vacuum, 
(a) Let v is the speed of light in a liquid whose index of refraction at this wavelength is 1.56.
We know that,
Refractive index,

(b) The wavelength of light in material,

Let
is the wavelength of these waves in the liquid. So,

Hence, this is the required solution.