A ball of mass 3m at speed v approaches a ball of mass 2m at speed -2v and they are about to collide. After the collision, what is the speed of the center of mass?
A. v
B. -v/5
C. v/5
D. -v
E. Can't decide because we don't know whether this collision is inelastic or elastic
C. v/5
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Uniform Circular Motion: One way that future space stations may create artificial gravity is by rotating the station. Consider a cylindrical space station 380 m in diameter that is rotating about its longitudinal axis. Astronauts walk on the inside surface of the space station. How long will it take for each rotation of the cylinder if it is to provide "normal" gravity for the astronauts?
A. 28 s B. 39 s C. 6.2 s D. 4.4 s
A postulated inflationary era in which the early universe expanded in size by a factor of 1030 in approximately 10-36 seconds is incompatible with the theory of relativity because the universe would have expanded faster than the speed of light
Indicate whether the statement is true or false
When the pressure applied to an unknown liquid is increased from 1.0 × 107 N/m2 to 5.5 × 107 N/m2, the volume of the liquid decreases by 0.70%. Calculate the bulk modulus of the liquid
What will be an ideal response?
In the context of plate tectonics, what is a subduction zone?
A) a place where two plates are slipping sideways against one another B) a place where a seafloor plate is sliding under a continental plate C) a place where two continental plates are colliding D) a place where two plates are pulling apart