Answer:
c) is negative
Explanation:
As we know that work done by a force is the product of force and displacement vector.
W= F.d
F= Force
d= displacement
The work done by friction force always negative because it try to oppose the motion and act opposite to the direction of displacement.So the work done by air resistance is negative.
c) is negative
Answer:
Im just here for the points man sorry
Explanation:
Answer:
100 Hertz
1,000 Hertz
10,000 Hertz
Explanation:
Humans can detect frequencies between 20 Hz and 20,000 Hz.
Answer:
Energy of ultra violet photons < Energy of radio waves
Wavelength of ultra violet photons > Wavelength of radio waves
Explanation:
The increasing order of the wavelength is given by
Gamma rays
x rays
Ultra violet rays
Visible radiations
Infrared rays
micro waves
Radio waves
So, ultra violet rays has larger wavelength than radio waves.
As we know that the energy is inversely proportional to the wavelength.
So, the energy of radio waves is more than the energy of ultra violet waves.
Energy of ultra violet photons < Energy of radio waves
Wavelength of ultra violet photons > Wavelength of radio waves
