What would happen if you dropped a small black hole on a planet?
154274
A 100 kg black hole would be incredibly small. A black hole is an object that has a density so great its escape velocity is greater than the speed of light. For a 100 kg weight to be that dense it would have to have a radius smaller than 1.48*10^-25 meter. That´s smaller than a quark. If such an absurd object could form it would still be just a 100 kilo weight. It wouldn´t suck the earth in. Immediately... Earth still weighs more. It would simply fall towards earth but when it reaches the surface it would just keep on falling as it would be too small to hit anything. It would fall straight through the core and start falling upwards until gravity would make it settle there. Eventually though some matter in the core would come so close it would be captured by it. Remember that an object would have to move faster than the speed of light to escape a black hole. So the mass of the black hole would increase with time, feeding on earth. And as its mass grows it would capture matter in an increasingly greater rate. Eventually you would have a black hole with the mass of earth (+100 kg) orbiting the sun instead of the lush, blue planet we all know and love.
1142803
First off, that a black hole sucks everything around it in is basically a myth.  The pull of a black hole at a distance r>Rhorizon is equal to the pull of any other equally massive spherical object.  So if the sun collapsed into a black hole, ignoring the fact  that it's not nearly massive enough (by a factor of 10), we would still feel the same pull of gravity and remain in the same orbit.  That said, in a quickly rotating black hole, there is an inner horizon where the inescapable fall towards the singularity at  the center of the black hole is halted.  Inside this second horizon space remains spacelike, meaning time travel is possible, unfortunately escape from this inner horizon is impossible because there is still the area between the inner and outer horizon which is one directional and impossible to penetrate.
223615
if only you could bring planet to standstill then  it would surely hit sun.the movement of planet around sun create a centrifugal force resisting gravitational pull.
1168078
we'd become a black hole. ooh nooo
753089
The realistic answer is no, for several reasons.  \n1)  Our sun is too small to collapse into a blackhole.  Even if it did the planets are too far away to be sucked in.  Just because a star turns into a black hole doesn't mean that its gravity get any stronger.  The planets would just orbit it like normal except that there would be no light coming out of it and also no heat.  \n\n2) Our galaxy spirals around a black hole and we haven't been sucked in yet.  Once again, that is because a black hole is only as strong as the mass it contains.  Instead it just keeps all of the stars in the galaxy orbiting around it.  \n\n3) They only way it is possible is if one of the minor galaxies which orbits our galaxy happened to collide with the Milky Way.  If that were to happen the black hole in that galaxy could pass near enogh to the Earth or our solar system to suck us in.
863481
A black hole is just like any other star or planet. \n\nThe larger the body's mass, the greater its gravity pull. That's why the lunar astronauts could bounce along on the moons surface, the gravity there is much lower than on Earth as the moon is much smaller.\n\nOur sun's gravity is enough to keep all the planets in their orbits.\n\nA black hole was a very large star, with high gravity, so high that when it ran out of fuel, it collapsed in on itself. Because the material making up this star is now concentrated down to such a degree that the gravity near it is so strong even light cannot escape, we call it a black hole.\n\nIf something is sucked into it, the mater does not go anywhere, it just gets squashed into the same place as all the other material making up the black hole.
156917
It depends on how it came to rest. If it had Striked any other ball then its K.E will be transfered to the other. If u were to catch it , then imagine how u will bring your hand towards the ground so as to reduce its impact.Thus its k.E is transferred to you.\n               But if it were to strike the ground then the case is different.From conservation of momentum ,M1V1=M2V2.If M2 be the mass of earth, it is very large when compared to that of the ball. So to satisfy the above condition, V2 should be negligbly small. so we do not face amy impact. Now consider the case of an asteroid or an Hydrogen bomb.We r sure of expriencing the impact.
38830
a black hole is a point of infinite density and gravitational pull. First of all you would be dead from different gravitational pulls from the black hole. Second of all, time from your perspective would stop, assuming that einstein is correct and your image would be spread out over an infinite period of time so your friend would see nothing.
849237
There's most likely not an 'other side'.  A black hole is a bunch of matter that's been compressed down into a singularity, or an extremely dense spot.  More stuff falling into the hole isn't going anywhere; it's just contributing to the density of the black hole itself.
678337
I think you may be referring to Hawking radiation.\n\nVirtual particles come into being all the time but are annihilated before they can be detected by virtual anti-particles.  But close to a black hole with a very steep gravity well what can happen is that one of the particle-antiparticle pair is sucked into the black hole and the other one escapes.  The mass energy of the particle that escapes is taken from the black hole and the black hole gets a little bit lighter.\n\nBecause it is a process that depends on how steep the gravity well is and because smaller black holes have steeper gravity wells the smaller a black hole is the less time it takes to decay away (so a black hole as heavy as a mountain would take billions of years while one as heavy as a star takes way longer).
63870
Not much is known about black holes. What is known is only an estimate of how it might work.
568346
No. A star must have sufficient mass to self-compact within the Schwarzchild radius to become a black hole. For Earth, that radius is about the size of a ping-pong ball. If the star is too light, it becomes a neutron star or white dwarf. A black hole is really just one of those ewith an escape velocity greater than the speed of light.
1018278
that would depend on the velocity of the craft, the velocity the at you were pushed out with respect to the velocity of the craft, and what near by celestial or terrestrial bodies were near, to influence your movement with their gravitational pull...  if you wre set outside a ship, with zero velocity, and left, out in deep space... you would remain essentially motionless... if the same were done to you near the earth, you wold fall to the earth.. if you were pushed out the side door of the space shuttle while it orbited... you would most likely orbit several time before your orbit decayed and you would have a incredibly painful reentry... as short as the pain might be...
205927
a black hole will crush any thing, even the smallest thing you can think of. a black hole will suck up any light and matter, so the shuttle will get chrushed and spit out into something samller then nanoscopic out the other end. the reason the milky way is spining is because there is a black hole.
627291
Nothing.  A warhead would have no effect, since it would be fryed, melted, crushed, and sucked into the black hole.  It wouldnt even make it past 10 feet before all of that happenes to it from a black hole.
10086
it is the radiation given off by a black hole and it is also what causes extremely small black holes to disintergrate.
295671
The red giant star wouldn't even have to drift into a black hole to experience its effects; anywhere within the black hole's gravitational realm and the star's material will be sucked off and drawn into the black hole. Red Giant stars are supernova candidates due to their immense mass, but as this one loses more and more mass to the black hole the chances of a supernova would diminish. Eventually the star could be completely drawn in. Then it would be completely shredded and torn apart. For an artist's conception of what this would look like go here -- >http://www.art.com/asp/display-asp/_/ID--1849/PG--4/posters.htm?TNID=1&ui=02A4F7B391854142AA1E8C601DCB3E5A\n\nGod is spelled B-I-G B-A-N-G\nPBrax@netscape.com