Physics
During the motion of a projectile fired from the earth surface, ________

Vertical component of its velocity remains constant
Horizontal component of its velocity remains constant
Its momentum remains constant
Its kinetic energy remains constant

ANSWER DOWNLOAD EXAMIANS APP

Physics
A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?

The speeds of both the photons in vacuum are different
The frequency of X-ray photon is higher than the frequency of visible radiation photon.
Both the photons have different energies.
The wavelength of X-ray photon is less than the wavelength of visible radiation photon.

ANSWER DOWNLOAD EXAMIANS APP