Answer the following statement(s) true (T) or false (F)
1. A divergent boundary forms between two oceanic plates and the resulting oceanic ridge.
2. The Himalayas formed due to a continent-continent collision.
3. Plate tectonics theory states that the outer layer of the Earth, the lithosphere, is broken up into several plates that move atop of a more ductile like asthenosphere.
4. Convection currents in the mantle cause the tectonic plates of the lithosphere to move.
5. Convergent boundaries move toward each other.
1. True
2. True
3. True
4. True
5. True
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Collisions in Two Dimensions: Two dogs, Rover and Fido, run on a level frictionless surface. Rover runs eastward with a momentum of 24 kg . m/s, and Fido runs northward with momentum 10 kg . m/s. They make a sudden perfectly inelastic collision. What is the magnitude of their combined momentum after the collision?
A. 14 kg . m/s B. 26 kg . m/s C. 34 kg . m/s D. It cannot be determined without knowing the masses and velocities of the dogs.
About what percent of all asteroids are C-type asteroids?
A) 5% B) 10% C) 15% D) 50% E) 75%
A violation of the second law of thermodynamics would occur if
A. a ball lying on the ground spontaneously moved to the top of a desk. B. an object with low temperature transferred energy in the form of heat to an object with a higher temperature. C. a motion picture was run backwards through the projector. D. any of the above occurred. E. (a) or (b) occurred, but not (c).
Starting from rest, a car accelerates down a straight road with constant acceleration a1 for a time t1, then the acceleration is changed to a different constant value a2 for an additional time t2 . The total elapsed time is t1 + t2 . Can the equations for motion with constant acceleration be used to find the total distance traveled?
a. No, because this is not a case of constant acceleration. b. Yes, use (a1 + a2)/2 as the average acceleration and the total time in the calculation. c. Yes, use a1 + a2 as the acceleration and the average time (t1 + t2)/2 in the calculation. d. Yes, break the problem up into 2 problems, one with the conditions for the first time interval and the other with the conditions for the second time interval, noting that for the second time interval the initial velocity is that from the end of the first time interval. When done, add the distances from each of the time intervals.