About how much mass does the Sun lose through nuclear fusion per second?
A) 4 tons
B) 4 million tons
C) 600 tons
D) 600 million tons
E) None; mass is conserved.
B) 4 million tons
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A meniscus lens is made with the radius of curvature of the convex surface being 25.0 cm and the concave surface 45.0 cm. If the glass used has index of refraction 1.50, what is the focal length of this lens?
A) -32 cm B) 32 cm C) 113 cm D) 67.5 cm E) -113 cm
Transformers: The primary of an ideal transformer has 100 turns and its secondary has 200 turns. If the input current at the primary is 100 A, we can expect the output current at the secondary to be
A. 50 A. B. 100 A. C. 200 A. D. none of the given answers.
The Sun's mass and volume are over a million times that of our Earth
Indicate whether the statement is true or false
A cube of wood of density 0.780 g/cm3 is 11.2 cm on a side. When placed in water, what height of the block will float above the surface? (water density = 1.00 g/cm3)
a. 8.74 cm b. 11.2 cm c. 2.46 cm d. 3.46 cm e. 1.46 cm