Which of the following provides clear evidence for dark matter? (Select all that apply)
| A. |
Cepheid variable stars |
|
| B. |
gravitational lensing |
|
| C. |
supernovas |
|
| D. |
galaxy rotation curves |
Which of the following provides clear evidence for dark matter? (Select all that apply) A. Cepheid...
1. Observations of which of the following have been used to deduce an accelerating expansion of the universe? Select one: a. Gravitational lensing. o b. Cepheid variable stars. c. Trigonometric parallax. d. Exploding white dwarfs. e. Doppler shifts.
What is the evidence that planets orbit other stars? (Check all that apply.) a. Planetary nebulae surrounding the remnants of stars. b. Doppler shifts in a star’s spectrum due to the very small motion of the star as it and the planet orbit their center of mass. c. Decrease in the brightness of a star during planetary transit. d. Brief magnification of a distant star’s brightness due to gravitational lensing as the planet passes between Earth and the star.
Which observation(s) is evidence that most of the stars, gas, and dust in our galaxy is in a thin disk? Select all that apply O Radio, X-ray,and gamma ray observations show gas in a band across the sky O Infrared observations show dust in a band across the sky O Individual stars appear in a band across the sky O Globular clusters appear in all directions on the sky Question 15 1pts Which observation(s) provide evidence that our galaxy formed...
JUST CHOOSE ABCD QUESTION 6 When was most of the Helium in the Universe formed? A. Throughout the history of the Universe, by nuclear fusion in stars B. A few minutes after the Big Bang C. At the time of Recombination D. At the time of the Big Bang 10 points QUESTION 7 Based on current estimates of the value of Hubble?s constant, how old is the universe? A. more than 100 billion years old B. between 5 and...
1) The missing mass problem is a) starlight is observed, but there is no evidence of mass b) the amount of mass measured is less than the amount of light measured c) starlight follows the same distribution as mass d) there are indications of mass from motion but no light e) spacetime is warped by mass 2) The rotation curve of the Galaxy is a) flat in the core, planet-like in the disk b) wheel-like in the core, flat in...
Question 8 For ZFNs, indicate which of the following properties apply (select all that apply) Select one or more: a. Associated with FokI b. Depends on HDR/NHEJ c. Can be used to introduce a new fragment of DNA into the genome d. Uses gRNA e. Can be engineered to target a sequence of exactly 16 nucleotides in the genome Question 9 For TALENs, indicate which of the following properties apply (select all that apply) Select one or more: a. Associated...
Which of the following are files according to Linux? Select all that apply. Select one or more: a. Named pipes b. Regular files. c. Directories d. UIDs
Which of the following statements is consistent with evidence-based decision making? Check all that apply. A)Evidence-based decision making encourages questioning assumptions. B)Knowing what you don’t know is as important as knowing what you do know. C)Managers should make choices that support past decisions. D)Evidence-based decision making uses opinions and intuition to provide a rationale for decisions.
SELECT ALL THAT APPLY: Which of the following are signs of heart failure? Select one or more: a. Elevated blood pressure b. Peripheral edema c. Angioedema d. Reduced ejection fraction
Which of the following statements about red giant stars are true? (Select all that apply.) Red giant stars are less luminous than main sequence stars of the same temperature. Red giant stars tend to be more luminous than main sequence stars of the same temperatures because they are larger in size. Red giant stars are less luminous than main sequence stars because fusion happens more rapidly in main sequence stars. A red giant star of a given temperature is more...