When you flick a card from beneath a coin that hardly moves, you're illustrating
A) inertia.
B) equilibrium.
C) support force.
D) friction.
Answer: A
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Name 5 different type of waves or wave motion
What will be an ideal response?
Which is correct?
A.) 6 flavors of quarks and 6 flavors of antiquarks. B.) 3 flavors of quarks and 3 flavors of antiquarks. C.) 6 flavors of quarks and 2 flavors of antiquarks. D.) 2 flavors of quarks and 2 flavors of antiquarks. E.) 12 flavors of quarks and antiquarks can't exist at all.
A 480-kg car moving at 14.4 m/s hits from behind a 570-kg car moving at 13.3 m/s in the same direction
If the new speed of the heavier car is 14.0 m/s, what is the speed of the lighter car after the collision, assuming that any unbalanced forces on the system are negligibly small? A) 13.6 m/s B) 10.5 m/s C) 19.9 m/s D) 5.24 m/s
A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page. The external field decreases to 0.020 T in 12 milliseconds
(a) What is the magnitude of the change in the external magnetic flux enclosed by the coil? (b) What is the magnitude of the average voltage induced in the coil as the external flux is changing? (c) If the coil has a resistance of 4.0 ohms, what is the magnitude of the average current in the coil?