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What two quantities did Edwin Hubble compare to discover the expansion of the Universe?
Wiki User
∙ 12y ago
The Serperation of Galaxies which was caused by Dark Energy, and the Big Bang.
Wiki User
∙ 12y ago
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What is the sign used to compare quantities and measurements?
that would be the division symbol
How do you calculate dark energy?
Cosmological red-shift tells us that the space within our Universe is expanding. It is NOT that the matter within our Universe exploded; rather, SPACE ITSELF is growing bigger. Until about 1995, nobody knew of any entity, other than gravity, in our Universe that could alter the rate of expansion -- and gravity could only slow down this rate. The question was how much was gravity slowing this expansion. Several researchers worked to resolve this question. When Saul Parlemutter first calculated that the rate of expansion had actually increased over time (we're talking billion of years, mind you), he was sure he had made a dreadful mistake, and diligently searched for his error. After much effort, he finally concluded he had NOT made a mistake, and that the rate of expansion of the space in our Universe really IS increasing. So what IS the entity that is causing the rate of expansion to increase? We have NO IDEA!! That's why it's been given the name "dark energy." We know it's there because we can see its effects, but (for now) we don't know what it is. So how do we "calculate" dark energy? We simply compare the change in the rate of expansion that we SHOULD see (ie, what we would expect if dark energy didn't exist) -- and this rate should be very close to zero -- with the change that we do see. The difference is the amount of dark energy in our Universe.
How do the coefficient in a balance equation compare quantities of two substances?
Type your answer here... The ratio of the substances' coefficients equals the ratio of their number of moles.
What is a simple explanation for the Big Bang Theory?
Big Bang Cosmology states that our Universe has, over the last 13 billion years or so, been expanding such that the distance between every point in our Universe to every other such point is increasing. There is no center out of which matter came, no explosion, no "bang" -- just an ongoing expansion of distance between all points within our Universe. This theory has overwhelming evidence to support it, and any competing idea is reduced to stating, "I can't explain why we see what we see -- we just do." The theory makes no statement whatsoever on how this expansion started, or what happened "before" the start of this expansion.
How do distances between planets solar systems galaxies and the universe compare?
The distance between planets are measured in millions of kilometers while the distance between solar systems are measured in light years while the galxies and the universe are measured in AU (astronautical units)
Uses division to compare two quantities?
A ratio uses division to compare two quantities.
What is a symbol used to compare two quantities?
=, > or <.
Can you use percents to compare two quantities?
Yes
How can i select tools to compare quantities in real world situations?
The answer depends on what quantities you wish to compare. And, in a real world situation, it also depends on what tools you are capable of obtaining and using!
What is a relational operators defined in c?
to compare the two quantities
Do Odds compare two quantities?
Yes, two probabilities.
What shall I compare Christmas to?
A universe of joy
Ratios that compare quantities of different units are called?
Proportion (i think...)
What two quantities does mechanical advantage compare?
Input and output (of energy)
What is the sign used to compare quantities and measurements?
that would be the division symbol
What do we call a chart that helps compare facts and numbers and quantities?
graph
How can asronomers infer approximately how long the universe has been expanding?
As a first approximation, they compare the current speed of expansion, with the distance between the expanding objects. The expansion is at a speed which, extrapolated backward, would place all galaxies very close together at a time that is ca. 14 billion years in the past.
