If a theory is testable, its underlying ________ and its ________ can be exposed to experimental verification
Fill in the blank(s) with correct word
assumptions; predictions
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In an ionic material, the ______________potential is the attractive energy between ions.
Fill in the blank(s) with the appropriate word(s).
Suppose that we wish to find the "net force" on an automobile, in order to apply Newton's law of motion to the motion of the automobile
As part of the net force, do we need to include "internal frictional forces" due to internal gears, bearings, etc.? A) Yes, because of Newton's law of force pairs. B) No, because only external forces need to be included. C) Yes, because every internal and external force must be included. D) No, because only the drive force needs to be included. E) Yes, because these forces dissipate some of the car's energy.
A baseball is thrown by the center fielder (from shoulder level) to home plate where it is caught (on the fly at shoulder level) by the catcher. At what point does the magnitude of the vertical component of velocity have its minimum value? (air resistance is negligible)
a. just after leaving the center fielder's hand b. just before arriving at the catcher's mitt c. at the top of the trajectory d. magnitude of vertical component of velocity is constant
A 50-kg ice skater moving at 6 m/s collides with a second stationary skater with mass 70 kg. The skaters cling together after the collision and move without friction. Compute their speed after the collision