What star has such a strong gravitational pull that no electromagnetic radiation can escape?
It is no longer a star but a cosmic body which hsa imploded into a black hole.
The gravity in a black hole is so strong that even light can't get out of it. Nothing, with the exception of Hawking Radiation, can escape from a black hole. Effectively the gravitational force is infinitely strong. Black holes are stronger than a thousand planets. Every planet they swallow, makes their power grow.
actually in our daily life experience electric force or u can say electromagnetic force is more powerful than gravitational force. electromagnetic force is about 10^59 times stronger than gravitational force... but in light of string theory or m theory gravitational force is also as strong as electromagnetic force in multidimensional universe. for more info.- watch the documentary movie 'the elegant universe' by 'brian greene
Nuclear chemistry deals with the chemical reactions involving radioactive elements. Gamma radiation is due to the electromagnetic force, beta radiation is due to the weak nuclear force, and alpha radiation is due to the residual strong force (which you might call the strong nuclear force). So... if you didn't have the nuclear force, you wouldn't have alpha radiation.
Which of these is not a fundamental force of nature the force of wind nuclear forces gravational forces electromagnetic force?
The force of gravity the electromagntic force the strong nuclear force and the weak nuclear force are?
Radio waves, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays, Gamma Rays etc. are all Electromagnetic radiation, just at different frequencies. In physics, radiation is any process by which energy travels from one body to another. When most people hear radiation they think of ionising radiation, which is a radiation that is strong enough to ionize atoms. X-Rays are both Electromagnetic radiation and ionising radiation, because of the later it is a health hazard. http://en.wikipedia.org/wiki/Radiography