I am sure this is a silly question, but I was reading something that described the...

I am sure this is a silly question, but I was reading something that described the pre big-bang universe as having "nearly infinite mass."

How can something be "nearly" infinite? The term seems to make no sense.

Expert Solution

The universe seems to be well described by a solution to Einsteins equation called the FLRW metric. If you extrapolate this backwards towards the Big Bang the density of matter increases, and at the Big Bang itself the density becomes infinite.

A quick side note: the universe may well be of infinite size, so it's mass is necessarily infinite. It only makes sense to talk about the density i.e. the amount of matter in some chosen volume.

Anyhow, few believe that the density actually becomes infinite. It's widely believed that quantum gravity, or something like it, intervenes as we approach the moment of the Big Bang. I'd guess that the article you've read means that the density becomes extraordinarily large as we approach the Big Bang, but never becomes infinite. Hence the description "nearly infinite". However I agree with the other answers that the phrase "nearly infinite" is meaningless outside of a metaphor.

genius_generous answered 2 years ago

Python: I am not sure where to begin with this question, and I hope I can...

Python: I am not sure where to begin with this question, and I hope I can get an input on it. This is in regards to Downey's program, and we are asked to make two changes. Downey prints time as they do in the Army: 17:30:00 hours. We want to print that as 5:30 PM. Downey lets you define the time 25:00:00 - we want to turn over at 23:59:59 to 00:00:00. (I am asked to identify my changes with...

I have a concept question that I am not sure how to answer: ABC Company is...

I have a concept question that I am not sure how to answer: ABC Company is in the process of preparing a budget for the upcoming year. The marketing department has just increased the number of units in the sales budget by a significant 50% as compared to the last sales budget that was prepared for the year. Explain the impact this change will have on the Cash Budget. Be specific about… how the components of the Cash Budget will...

I am stuck on this problem and I am not sure what the solution is. In...

I am stuck on this problem and I am not sure what the solution is. In C Write item.h and item.c. In item.h, typedef a struct (of type t_item) which contains the following information: t_item: char name[MAX_ITEM_NAME_STRING]; char description[MAX_ITEM_DESCRIPTION_STRING]; Make sure that MAX_ITEM_NAME_STRING and MAX_ITEM_DESCRIPTION_STRING are defined with suitable sizes in your item.h. Typical values are, 25 and 80, respectively. Add the following interface definition to item.h: int item_load_items(t_item items[], int max_items, char *filename); Returns the number of objects loaded...

I am sure you have heard the saying that goes something like why fix what isn't...

I am sure you have heard the saying that goes something like why fix what isn't broken, but how will you know if it is broken. Policies and procedures are usually seldom reviewed once implemented which can prove to be disastrous. Explain why and how often a facility should review and update the security policy.

I am not quite sure what this question is asking, nor do I understand how to...

I am not quite sure what this question is asking, nor do I understand how to apply the lower-of-cost-or-NRV. The controller of Alt Company is applying the lower-of-cost-or-net realizable value basis of valuing its ending inventory. The following information is available: Cost Net Realizable Value Lawnmowers: Self-propelled $14,800 $17,000 Push type 19,000 18,000 Total 33,800 35,000 Snowblowers: Manual 29,800 31,000 Self-start 19,000 21,000 Total 48,800 52,000 Total inventory $82,600 $87,000 Compute the value of the ending inventory by applying the...

The Table in my homework question below is completely wrong. I am not sure where I...

The Table in my homework question below is completely wrong. I am not sure where I went wrong in my calculations but coud you rework this question and answer the parts below?? Here are earnings per share for two companies by quarter from the first quarter of 2009 through the second quarter of 2012. Forecast earnings per share for the rest of 2012 and 2013. Use exponential smoothing to forecast the third period of 2012, and the time series decomposition...

The question below is very long and I am not sure how to answer some of...

The question below is very long and I am not sure how to answer some of the questions. How much energy is needed for normal breathing? and How might this change with lung disease? how the ingredients in tobacco smoke damage/impair the respiratory system? What brain region controls respiration? What gas do the respiratory centers of the brain detect? How does this affect the respiration rate??

I am working on this problem for the company AT & T and am not sure...

I am working on this problem for the company AT & T and am not sure how to start it. Draw a chart of the main inter-organizational linkage mechanisms (e.g., long -term contacts, strategic alliances, mergers) that your organization uses to manage its symbiotic resource interdependencies. Using resource dependence theory and transaction cost theory, discuss why the organization to manage its interdependencies in this way. Do you think the organization has selected the most appropriate linkage mechanisms? Why or why...

I am taking history of psychology the bellow is my question Identify something new that you...

I am taking history of psychology the bellow is my question Identify something new that you learned about Darwin in this unit. For example, beyond his famous theory of evolution, did you know his thoughts on geography or slavery, or were you aware of his five-year voyage? Additionally, use this forum to brainstorm with your professor and classmates on contributions of early theorists, such as how Weber’s two-point threshold speaks to modern neurology.

I am a researcher interested in children’s reading. I feel children should be reading more as...

I am a researcher interested in children’s reading. I feel children should be reading more as they get older and feel generally interested in learning about current reading trends. I feel a good way to learn about the current reading trends to learn about their Accelerated Reader points. I feel older students are already reading more and should have more AR points than younger students. I predict that the older children will have more AR points than younger children. What...

Question