You wish to obtain a magnification of -2 from a convex lens of focal length f. The only possible solution is to
A) place a virtual object at a distance 3f/2 from the lens.
B) place a real object at a distance 3f/2 from the lens.
C) place a virtual object at a distance 2f/3 from the lens.
D) place a real object at a distance 2f/3 from the lens.
E) place a virtual object at a distance 5f/3 from the lens.
B
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Brown dwarfs have not been found in the halo of our Galaxy
Indicate whether the statement is true or false
According to relativity theory, if a space trip finds a son or daughter biologically older than their parents, then the space trip is taken by the
A) son or daughter. B) parents. C) either of these D) neither, it can't be done.
A 2.00 kg-ball has zero kinetic and potential energy. Ernie drops the ball into a 10.0-m deep well. Just before the ball hits the bottom, the sum of its kinetic and potential energy is:
a. zero. c. -196 J. b. 196 J. d. 392 J.
A rectangular loop of wire, with dimensions shown in Figure 27-10, carries a current of 2 A and is placed in a magnetic field of 0.8 T. The wire rotates in the magnetic field and at one point it is perpendicular to the magnetic field
What is the magnitude of the torque acting on the wire? A) 0 Nm B) 1 Nm C) 2 Nm D) 3 Nm E) 4 Nm