In the first second of the universe, the universe cooled and inflated. A result is a separation of one unified force into four distinct forces
a. True
b. False
Indicate whether the statement is true or false
True
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Two bodies P and Q on a smooth horizontal surface are connected by a light cord. The mass of P is greater than that of Q
A horizontal force (of magnitude F) is applied to Q as shown in the figure, accelerating the bodies to the right. The magnitude of the force exerted by the connecting cord on body P will be A) zero. B) less than F but not zero. C) equal to F. D) greater than F.
A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet is released from rest and falls toward the coil
As viewed from above, what is the direction of the current induced in the coil as the magnet approaches the coil? A) counterclockwise B) clockwise C) No current is induced in the coil. D) An emf but no current is induced in the coil.
Isotope A has a decay constant of 0.861 s-1 and isotope B has a decay constant of 0.627 s-1. Which isotope has a longer mean life (time constant)?
A) isotope A B) isotope B
If the absolute value of the magnification is equal to one, then the image is
A) larger than the object. B) the same size as the object. C) smaller than the object.