Let’s model the Universe as a collection of galaxies similar to the MWG, spaced 3 Mpc...

Let’s model the Universe as a collection of galaxies similar to the MWG, spaced 3 Mpc apart. Assume that the MWG has about 1011 stars with an average mass of one solar mass, and gas+dust mass equal to the stellar mass. (a) What is the average baryonic (i.e. detectable) mass density in this Universe? [kg/m3] (b) The local interstellar medium density is about 1 hydrogen atom per cm3. How does this compare with the answer to part (a)? (b) What is Omega, and hence the fate of this Universe? (closed, flat, open)? (c) Suppose the dark matter content of all galaxies was 10x the baryonic matter. Now what is Omega?

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genius_generous answered 2 years ago

Consider the full multiplier model with trade and government. Let’s assume the MPC is .75 and the...

Consider the full multiplier model with trade and government. Let’s assume the MPC is .75 and the initial equilibrium is at $10,000. If Investment Expenditure drops by $500 what happens to equilibrium? What change in government policy would a Keynesian economist recommend in this situation if the initial equilibrium at $10,000 corresponded to full employment? Give a specific $ amount for the necessary change in government spending. Tell me about the logic/process by which an increase in G will cause “multiplier effects”. Describe at...

Where in the Universe do we observe the ordinary matter? Select one: a. as galaxies and...

Where in the Universe do we observe the ordinary matter? Select one: a. as galaxies and intergalactic gas b. throughout the galaxies and in the extended halos around them c. throughout the observable universe

A straightforward interpretation of your data suggests a universe of galaxies that has been expanding for...

A straightforward interpretation of your data suggests a universe of galaxies that has been expanding for over 10 billion years. How do you incorporate this information into your view of God as Creator? Do you interpret the Biblical account of creation as stating that God created the entire universe of galaxies and stars at the same time He put man on Earth?

10. The Hubble Age. Let's estimate the age of the universe. Pick two galaxies, one 10...

10. The Hubble Age. Let's estimate the age of the universe. Pick two galaxies, one 10 Mpc away, and one 100 Mpc away. Calculate how fast each one is moving away from us, assuming a Hubble constant of 70 km/sec/Mpc. Assume they have always been moving at that speed and calculate how long (in years) it has taken them to reach their present distance. Because the expansion is uniform, it shouldn’t matter which galaxies you use. What is your estimate...

The table below contains distance and recessional velocity data for ten galaxies. Galaxy Distance (Mpc) Observed...

The table below contains distance and recessional velocity data for ten galaxies. Galaxy Distance (Mpc) Observed Velocity (km/s) 1 42.0 2546.0 2 92.3 5964.9 3 92.7 5490.1 4 92.9 6652.7 5 93.1 5115.3 6 150.0 9800.0 7 320.0 20260.0 8 450.0 28150.0 9 553.0 34889.0 10 642.0 40536.0 a) Plot the ‘Hubble Diagram’ for these galaxies. This is simply a plot of the observed velocity on the y-axis and the distance on the x-axis. b) Fit a line to the...

Now, let’s look at the effect of difference in MPC. Fill out the following table (your...

Now, let’s look at the effect of difference in MPC. Fill out the following table (your answer for all Italians should come from question 1) Effect of Difference in MPC Marginal propensity to consume Multiplier on government spending All Italians .52 2.08 Group 1 .3 1.43 Group 2 .65 2.86 Discuss the differences in multipliers. In words (not math!), how does the MPC relate to the multiplier? Group 1 and Group 2 are two mutually exclusive collections of people in...

What is the multiplier if households have an MPC of 0.6? Create a table similar to...

What is the multiplier if households have an MPC of 0.6? Create a table similar to Figure 10.8 in your textbook. Assume that the households have an MPC of 0.80 and there is a $9 billion increase to investment spending. Change in income Change in consumption Change in savings Round 1 Round 2 Round 3 Round 4 Round 5 All others Total

In the income-Expenditures model, the size of the mpc is assumed to be: Group of answer...

In the income-Expenditures model, the size of the mpc is assumed to be: Group of answer choices Negative (because of net taxes). greater than zero, but less than one. typically greater than one (especially for college students). none are correct Flag this Question Question 15 1 pts If Kojak's mpc is 0.80, this means that he will: Group of answer choices break even when his disposable income is $8000 save two-tenths of any level of income. spend eight-tenths of any...

The model with exogenous taxes (T=T̅) has a multiplier on investment of 1/(1-mpc). The model with...

The model with exogenous taxes (T=T̅) has a multiplier on investment of 1/(1-mpc). The model with proportional taxes (T=tY) has a multiplier on investment of 1/(1-mpc(1-t)). Explain in words why they differ.

. Assume a simple closed Keynesian model where the MPC is 0.9 and the MPIM is...

. Assume a simple closed Keynesian model where the MPC is 0.9 and the MPIM is 0.1. Also assume that potential real GDP is $2000 million, while actual (equilibrium) real GDP is $1200 million. a. What is the GDP gap? b. Is there an inflationary or recessionary gap? c. What change in government spending is required to restore the economy to full employment GDP? Show graphically using a Keynesian cross diagram. d. What change in...

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