A 4.0 cm tall object is placed 60 cm away from a converging lens of focal length 30 cm. What is the nature and location of the image?
A)
The image is real, 2.5 cm tall, 30 cm on the same side as object.
B)
The image is virtual, 2.5 cm tall, 30 cm on the other side of the lens.
C)
The image is virtual, 2.0 cm tall, 15 cm on the other side of the lens.
D)
The image is virtual, 4.0 cm tall, 60 cm on the same side as object.
E)
The image is real, 4.0 cm tall, 60 cm on the other side of the lens.
E
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A thin metallic shell of radius 40 cm has a charge of -25 nC on it. At the center of the sphere is a point charge of 35 nC. What is the electric field 15 cm from the center of the shell?
a. 
b. 
c. 
d. 
e. 
A helium nucleus is accelerated from rest through a potential difference V to a kinetic energy of 3.2 
What is V?
A. 1.0 MV B. 2.0 MV C. 1.6 MV D. 3.2 MV E. 0.51 MV
Answer the following statement(s) true (T) or false (F)
A battery always drives the same current through a circuit connected to it, no matter what the characteristics of that circuit might be.
Which internal heat source still generates heat within the terrestrial worlds today?
A) heat of accretion B) heat from differentiation C) heat from convection D) heat from radioactive decay