The rotation curve method can be applied only to pairs of galaxies orbiting each other
Indicate whether the statement is true or false
F
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An eclipse of the Moon (lunar eclipse) as seen from Earth, happens when
a. the hot luminous Moon suddenly cools and stops emitting light. b. the Moon passes between Earth and the Sun. c. the Earth is between the Moon and the Sun. d. the Moon is 90 degrees from the direction of the Sun.
Which of the following energy forms is associated with an object in motion?
a. potential energy b. elastic potential energy c. nonmechanical energy d. kinetic energy
The Tharsis region of Mars was most likely formed
A) from sediment that piled up due to past water erosion B) by plate tectonics C) by a plume of molten mantle material rising to the surface forming a bulge D) from compressions in the Martian crust as the planet cooled and contracted
The small piston of a hydraulic lift has a diameter of 8.0 cm, and its large piston has a diameter of 40 cm. The lift raises a load of 15,000 N. Assume the pistons each have negligible mass
(a) Determine the force that must be exerted by the fluid in the lift on the small piston. (b) Determine the pressure applied to the fluid in the lift.