Radio waves and visible light are both forms of electromagnetic radiation, so they both travel at the speed of light in vacuum. What makes them different are their wavelengths (or synonymously their frequencies).The wavelengths of visible light span from about 390-700 nm, and the frequency from 430 to 790 THz.The wavelengths of radio waves go from about 1 mm to 100 km, and frequencies between 3 kHz and 300 GHz.The different sized wavelengths also give rise to slightly different properties. For example, since radio waves have a longer wavelength and lower frequencies, they are less energetic than visible light. Recall:Elight=hν=hcλ
where Elight is the energy of the light, h is Planck's constant, c is the speed of light, νis the frequency of light, and λ is the wavelength
As the stan moves 0.94 s before with an acceleration 4.12 m/s^2
so the distance moved by it
![d = \frac{1}{2}at^2[tex]d = \frac{1}{2}*4.12*0.94^2](https://tex.z-dn.net/?f=d%20%3D%20%5Cfrac%7B1%7D%7B2%7Dat%5E2%3C%2Fp%3E%3Cp%3E%5Btex%5Dd%20%3D%20%5Cfrac%7B1%7D%7B2%7D%2A4.12%2A0.94%5E2)
speed gained by the car is given as
now the relative speed of them is given as
relative acceleration is given as
now the distance between them is to be covered
by solving above equation we have
so it will overtake after 6.64 s
Answer:
The heating element of the heater is made up of alloy which has very high resistance so when current flows through the heating element, it becomes too hot and glows red. But the resistance of cord which is usually of copper or aluminum is very low so it does not glow.
a is the correct answer
Explanation:
no.of proton defines atomic number in an atom
