Light with ? = 420 nm in incident normally onto the flat side of a plano-convex lens which is resting on a glass plate parallel to the flat side of the lens and forms a pattern of concentric luminous and dark rings (Newton's rings)
The radius of the second dark ring is 2.0 mm. What is the radius of curvature of the curved side of the lens? A)
9.6 m
B)
2.4 m
C)
4.8 m
D)
7.2 m
E)
1.2 m
C
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A vector lies in the x-y plane. For what orientations will both components be negative?
1.The vector lies between 180° and 270° from the x-axis. 2.The vector lies between 0° and 90° from the x-axis. 3.The vector lies between 90° and 180° from the x-axis. 4.None. Just like for vector magnitudes, components are always positive.
A 120-kg mass rests on a horizontal surface. What is the magnitude of the normal force exerted by the surface on the mass?
What will be an ideal response?
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H
When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
a.
A.
b.
B.
c.
C.
d.
D.
e.
E.
In the context of the stars in binary systems, which of the following statements is true of the Roche lobes?
A) Binary stars do not permit the transfer of mass from one star to the other. B) Matter inside a star's Roche lobe can be transferred to the companion star. C) A star's Roche lobe prevents any matter from outside the lobe from being lost. D) The Roche lobes can interfere with the evolution of the stars that are close together.