Time 0 A B C Time-1 billion years Time 2 billion years Distance scale in Mpc 6. [5pt] The picture above shows a simple one-dimensional model for an expanding universe. The points labled A, B and C ar...
Figure (b) shows the size vs. age graph of our universe. One can consider it as an x-t graph and read from it the expansion rate of the universe (velocity) and how the rate changes with time (acceleration). Are the statements below correct? (And explain) A. The universe is always expanding. B. 10 billion years ago, the expansion rate of the universe was increasing. C. The universe will be expanding slower 10 billion years later than it is now. (3B...
Spaceships A and B are at rest with respect to one another at a distance of 8.66 light-years and C is moving from A to B with a constant speed of 0.866 c. The clocksfor all three spaceships are synchronized at time tA = tB = tC = 0 at the instant when C passes A relative to all observers. According to spaceship C, what does B’sclock read at that same instant?(A) 0(B) 4.33 years.(C) 5 years.(D) 7.5 years.(E) 8.66...
4. (30 points) Cosmology One of the spectral lines of hydrogen is observed in the laboratory to emit photons with a wavelength of 121 nanometers. Looking at a distant galaxy, you find the same spectral line, but it is at 545 nm. (a) What is the redshift of the galaxy? (b) What was the scale factor when the galaxy emitted the photons that we are seeing today? (c) According to Hubble's law, how quickly is the galaxy moving away from...
16. The short run is a. less than a year. b. three years. c. a time period in which at least one input is fixed. d. a time period in which at least one set of outputs has been decided upon. According to the law of diminishing returns a. the total product of an input will eventually be negative. b. the marginal product of an input will eventually be negative.d c. the total product of an input will eventually decline....
What is a thermistor? (3pt.) A. B. What property of the thermistor changes with temperature? (2pt.) C. The figure shows temperature response measured by the thermistor. From the temperature vs time response, compute the 10% to 90% rise time and the 10% to 90% fall time. (5pt) 32 31 30 29 O 28 27 26 Heat Released e 25 24 23 21 19 Heat Applied 18 10 15 20 25 30 35 40 45 50 55 6065 70 75 80...
Problem 7 (20 points): Each graph below shows the relative intensity versus 0 for a double slit experiment. The horizontal scale is the same for all graphs. The only possible differences among the cases are the values of the slit width (a) and distance between the centers of the slits (d). Case For each of the three cases, calculate the ratio- a) 0.5 b) Rank the cases according to distance between the centers Case 2 of the slits (d), from...
A car is initially at rest on a straight road. The histogram below shows the car's speed along that road (the x-axis) as a function of time. a)Calculate the distance traveled by the car during the first 5 s. b)Calculate the distance traveled by the car from t=10 to t=14 s. c)Calculate the average speed of the car from t = 6 s to t=9 s. 6 1 2 34 56 78 9 18 11 12 13 14 Tine (s...
A stone is dropped from the upper observation deck of a tower, 400 m above the ground. (Assume g 9.8 m/s2.) (a) Find the distance (in meters) of the stone above ground level at time t (b) How long does it take the stone to reach the ground? (Round your answer to two decimal places.) (c) With what velocity does it strike the ground? (Round your answer to one decimal place.) m/s (d) If the stone is thrown downward with...
As the speed of a bicycle moving along a level, horizontal road changes from 2 m/s to 4 m/s, the bicycle's gravitational potential energy• increases.• decreases.• remains the same.• first increases then decreases.The total mechanical energy of a system• can never be negative.• is either all kinetic energy or all potential energy.• is constant.• is equally divided between kinetic energy and potential energy.A powerful machine does a lot of work in a __ amount of time.• friction• long• short• rate•...
Hello there,Can you please help me summarize this essay... like if you were re-reading it to a small child or even a pet.Please point out the eight of cirtical and creaticie thinking in the main character.Thank you so much!.I'm reading it too, I want a second opinion on this piece. To compare and contrast.The Starby Arthur C. Clarke (1955)It is three thousand light years to the Vatican. Once, I believed that space could have no power over faith, just as...