Which of the following is the most abundant element in the Universe?
A) Nitrogen
B) Oxygen
C) Carbon
D) Hydrogen
D
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What two observations allow us to calculate mass of the portion of the Galaxy within the Sun's orbit?
A) the Sun's composition and luminosity B) the Sun's mass and its age C) the Sun's age and period of the Galactic Year D) the Sun's mass and velocity in orbit of the Galactic Center E) the Sun's orbital velocity and its distance from the Galactic Center
Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Angular momentum
a. is definitely conserved. b. is definitely not conserved. c. may or may not be conserved. d. none of the above
An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 20.0 degrees. The narrow section is 15.0 m from the wide section and the narrow section is higher than the wide section. The velocity of the fluid in the wide section of the pipe is 6.00 m/s and the velocity of the fluid in the narrow section of pipe is 9.00 m/s. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1,000
A. 217 kPa B. 205 kPa C. 180 kPa D. 177 kPa E. 157 kPa
Which of the following most likely explains why Venus does not have a strong magnetic field?
A) It does not have a metallic core. B) Its rotation is too slow. C) It is too close to the Sun. D) It is too large. E) It has too thick an atmosphere.