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What else can I help you with?
Which planet does not have enough gravity to have an atmosphere?
Nercury
How does a ball defies gravity?
A ball defies gravity by having a force pushing it upwards, such as when it is thrown or kicked. Once that force diminishes, gravity pulls the ball back towards the ground. The ball's motion is constantly in opposition to gravity until it eventually comes to rest.
Do rocks have gravity?
No, rocks do not have gravity. Gravity is a fundamental force that exists between all objects with mass, including rocks. Rocks are subject to the force of gravity, just like any other object on Earth.
Do meteors have surface gravity?
Yes they are. Every object that has mass follows the well known formulas of gravity. Comets are no exception. Their orbits around the sun are perfectly and completely described by the formulas of gravity.
Can a simple pendulum oscillate in a moving satellite?
A simple pendulum (a weight hanging from a string swinging back and forth) is a gravity driven system. The pendulum weight is released, falls down, swings through the low point, rises up until it reaches the same height as it was released on the other side, reverses direction and falls down. Satellites in orbit do not have an interior gravity field to drag things down (think of all the Shuttle photos with astronauts demonstrating floating pens and globs of water) so the description of the pendulum action would be: Pendulum weight is released and hangs there.The equation for the period of a simple pendulum:T=2 pi (L/g)0.5 (T=period, L=string length, g=acceleration of gravity)indicates the need for gravity field for the pendulum to swing. At zero gravity T goes to infinity. The pendulum does not swing.An Addendum:There was a followup question - what if the satellite was spinning (e.g. Had an artificial spin induced "gravity": So so far most of the shuttles and satellites with enough room to swing a pendulum have not enjoyed spin or other induced "artificial gravity" so I didn't consider it in the question. But it does sound like fun to think about. : I had started to develop a long explanation using the vectors of spin induced gravity in a spaceship. Then I had a flashback to a book I had back before satellites were in orbit. The picture was one of those old big wheel type habitats spinning in space. Workers just hung there in the axle area in their own orbit with no impact from the rotation (spin doesn't radiate gravity waves) This is not the case for the pendulum as it is attached to the spinning object and eventually moves in a way that causes it to become part of the rotation. This results from the weight's reaction on being released to move tangentially to the arc of the spin. : Since the spinning satellite is essentially a gyroscope it will orient itself (the axis of rotation)in one direction against space. The pendulum weight swing can have two components: in the same direction as this axis, and with and against the rotation. : In the case of the weight's component of swinging in the rotation plane, the weight is essentially always "down" as far as it can go. Like you spinning with a weight on a string, no matter how close you bring the hand holding the end of the string, the weight always pulls directly out i.e. no swinging : Regarding the component of swing back and forth along the axis, the force pulling on the weight (g) changes with the distance from the axis of rotation the "gravity" changes and the equation I presented for the pendulum in my answer becomes an integral of "g" In addition the weight, it moves antispinward as it falls. An odd image - a chain would hang straight down, a waterfall in a spinning satellite would curve to the antispinaward with every drop at 0 g as it "fell" : NOTE: A bit of experimentation in the back yard indicates that it is hard to get any up and down motion with a weight on a string when I'm spinning. It may be that this motion damps out pretty quickly. : So far we haven't considered pendulum being in the spinning satellite orbiting a planet. If the pendulum were just hanging there in a non-spinning orbiting object it would have a different orbital period from the center of mass of the satellite and a different orbital height for whatever speed it was released at. I think it's faster is lower and slower is further for orbits. We'd have to consider this as well in determining its motion if the pendulum swing took it effectively into a higher or lower orbit .
Does a gryoscope put pressure at the point of contact?
Anything that touches something else puts pressure on the point of contact. In some cases, such as tapping a finger on paper or a gyroscope spinning on a flat surface, that pressure is light enough to be negligible.
How are dwarf planets similar to the eight planets?
The thing they have in common is the "hydrostatic equilibrium". What this means is that the planet or dwarf planet is large enough, and massive enough, to have a round shape due to its own gravity - a sphere, or in the case of a rapidly spinning object, an ellipsoid.
Why do cranes not fall forwards when lifting heavy weights?
It's because torque caused by gravity creates rotation around of the base of the crane. And the torque created by the counter mass is opposite in direction but not large enough to compensate torque caused by gravity.
1 through 7 ebula shrinks to form a spinning disk?
A spinning disk is formed by the nebula shrinking is 4. The planets forming is 7. The planets form gas and dust accumulate as a nebula matter separates into galaxies. Nebula shrink to form a spinning disk,gravity pulls gases to the center of the disk .Gas at the center of the disk becomes hot and dense enough for nuclear fusion to begin
What is the height of a bar stool needed for a kitchen breakfast counter?
There should be enough room for the person to get onto the stool and have enough room for their legs between the table and their legs so that their legs aren't hitting the counter. They should have enough height so that they can reach the counter and eat breakfast.
Is the moon weightless?
The moon is weightless, because the centrifical force of its rotation is counter acting on gravity. If both forces are exactly the same, they cancel out each other. The moon would have weight if it was close enough to fall, but otherwise no.
Is there enough gravity on the moon for people to breathe?
Breathing is not dependent on gravity or the lack thereof.
Which planet does not have enough gravity to have an atmosphere?
Nercury
How fighter jets can maintain lift when they do 90 degrees bank turn?
It's simple: they don't. If a fighter jet (or any other plane for that matter) banks to 90 degrees the plane will fall with the acceleration of gravity at that altitude. However, an observer on the ground may not perceive any elevation drop. In the case of a fighter jet, the pilot may yaw the nose of the plane upward creating a vertical component of thrust from his (or her) engines that will counter the force of gravity to some degree. Also, the bank angle may not be exactly 90 degrees, thereby achieving a small upward component of lift from the wings as well. These combined forces may or may not be enough to overcome gravity. Some people may argue that the centrifugal force of the banked turn will keep the jet at the same altitude. These individuals may use the example of carnival rides that, while spinning, hold you against a wall "in defiance of gravity". This is merely a principle of friction against a rigid object (the inner wall of the spinning cylinder). The centrifugal force generates enough friction against this wall that the friction overcomes gravity, not the centrifugal force. Air is obviously not rigid, so an airplane cannot generate friction enough due to centrifugal force to overcome gravity. In essence, the plane must have a component or combination of components of forces exactly opposing gravity in order to maintain a fixed altitude.
Could you fly off of a planet because there is no gravity?
No. All planets have gravity. Any object massive enough to be considered a planet would have strong enough gravity that you could simply escape by jumping. It is, however, possible for an object to escape the gravity of any planet if it is launched in the right way and with enough speed.
Can over the counter drugs kill babies?
Absolutely over the counter meds can kill anyone in a high enough dose.
What holds the Earth's atmosphere in place?
The atmosphere is held in place by the earth's gravity. Gravity is related to mass, the more mass a planet has, the more gravity. A much smaller planet like mercury or a body such as the moon will have less gravity, not enough to hold an atmosphere - the gravity is not strong enough to prevent the gas particles from escaping into space.
