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How do you measure the true velocity of an object in the universe if the velocity of all objects in the universe are relative to each other?
Wiki User
∙ 13y ago
If anyone ever referred to the "true" velocity of an object, he mis-spoke.
All we can directly measure from the earth is an object's velocity relative to the
earth. And when we have measured the velocities of several objects relative to
the earth, then we can calculate the velocity of one relative to any of the others.
But it's quite correct to observe that there's no such thing as the "true" or "real"
velocity of anything, without reference to something else.
Except for electromagnetic radiation, including light. That speed is always the same
for all observers, no matter who you are, or how you're moving relative to anything
else.
If I'm moving north at 0.3c, and you're moving south at 0.5c, and Mr. Tompkins
is moving west at 0.9c ... all relative to Dallas Texas ... and somebody in Seattle
shines spotlights at all three of us, then each of us measures the light passing
him at the same speed . . . 'c'. Each of us measures the same number.
Makes no sense at all. But it's true.
Wiki User
∙ 13y ago
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How might the objects found in the early universe differ from the objects found in the universe now?
In the early universe there was only Hydrogen and Helium (and a smidgen of Lithium).
Does gravity affect all or only some of the objects in the universe?
Gravity affects all of the objects in the universe, but then again, gravity doesn't affect the universe.
IS velocity possible in zero gravity?
Velocity is relative to the observer and or objects that are in the area , if your sitting in true zero gravity from your point of view you will be standing still but in-reality your velocity will based on your original thrust. Some one watching you (at a zero velocity) from another location might see you zoom by at the original velocity. So the new question is if that other person has zero velocity and is in zero gravity what time will it be when they look at their watch ? Hmmm
The cosmological redshift is a direct measure of the expansion of the universe thus independent of direction?
Actually, no on both counts. The redshift is a DIRECT measure of the fact that distant objects are moving away from us. It IMPLIES the expansion of the universe, but doesn't directly measure it. Also, even if it were, it wouldn't necessarily be independent of direction. One recent study indicates that it might not be, which (if true) means the Universe is not expanding isotropically.
What will happen to your kinetic energy if you double its objects velocity?
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How do you measure an objects speed and direction?
Velocity
Mass is a measure of an objects resistance to?
To acceleration (change in velocity).
Why is relative velocity AFTER equal to Vf2 minus Vf1 but relative velocity BEFORE equal to V1 minus V2 in the coefficient of restitution formula?
relative velocity is defined as the time rate of change of one object with respect to another object.the relative velocity depends upon the observer i.e.if the velocities of two objects are same then the relative velocity also seems to be equal.
What happens when you move magnets?
Their position relative to other objects in the universe changes.
What is a Doppler effects?
Change of frequency (of sound or light) dependent on the relative velocity of the two objects.
Is a measure of an objects velocity the same as the measure of the objects inertia?
No.Consider a grain of rice and a banana. If you threw these at someone so that they were moving at the same speed, their velocities would be the same.However, you would hardly feel the impact of the grain of rice but the banana would hurt.The force of the impact is a measure of the relative inertia of the two objects.Where two objects are traveling at the samevelocity, the inertia is greater in that object that has the greatest mass.
What is the difference between a objects speed and an objects velocity?
Velocity also includes direction.
What is a objects speed and direction?
Its called VELOCITY.
Why is velocity a vector quantity and speed is a scalar quantity?
Because it is: * A property of physical objects * Something that can be measured (or calculated from other quantities) Hmm, it is certainly not a physical quantity that is unique to the object! Velocity is relative to some other object. Thus, the can he threw traveled at 12m/s relative to the tree but 220m/s relative to that car.
What do you call it when an objects velocity changes?
A change in an objects velocity is called acceleration. Velocity is defined as an objects speed of travel AND its direction of travel. Acceleration can change only an objects speed, only its direction or both. If there is no acceleration acting on the object, then the velocity remains constant.
What is necessary to accurately and completely describe the motion of an object?
To completely describe the motion of an object you will need to know (1) the object's position in space and time, (2) the objects velocity, including the direction of travel, and (3) the object's acceleration, including the direction of acceleration. However, the Heisenburg Uncertainty principle states that the more accurately you measure object's position, the less information you will have about its velocity, and vica versa. The more accurately you measure an object's velocity, the less information you will have about its position.
How did albert Einstein change the way people think?
Prior to Einstein's 1905 papers, scientists assumed there was a static "space" against which all objects could have their position and velocity measured. Einstein showed this was incorrect, that one could only measure positon and velocity relative to some other object. Thus, it is impossible to determine absolute motion, only motion relative to another observor. This change in viewpoint showed that time and simultaneity also did not have absolute meaning, but were only measurable relative to some other event.
