The Sun creates its energy by the process of
a. nuclear fission.
b. nuclear fusion.
c. convection.
d. conduction.
e. radiation.
b
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Thin Lenses: A 4.0-cm-tall object is placed 50.0 cm from a diverging lens having a focal length of magnitude 25.0 cm. What is the nature and location of the image?
A. A real image, 4.0 cm tall, 20 cm other side of the object B. A virtual image, 4.0 cm tall, 20 cm other side of the object C. A virtual image, 2.0 cm tall, 10 cm other side of the object D. A virtual image, 1.3 cm tall, 16.7 cm same side as the object E. A real image, 1.3 cm tall, 16.7 cm same side as the object
Chemical disequilibrium inevitably exists near deep-sea volcanic vents, because
A) there are unequal concentrations of minerals and water B) the high-temperature vent water causes water molecules to break down into hydrogen and oxygen C) mixing between the high-temperature vent water and the surrounding low-temperature ocean water creates conditions in which minerals and water will undergo chemical reactions D) the high pressures existing at the ocean floor cause chemical reactions between minerals and water
An electric car is designed to run off a bank of 14.0-V batteries with total energy storage of 3.00 × 10^7 J. If the electric motor draws 7 000 W, what current will be delivered to the motor?
a. 500 A b. 250 A c. 750 A d. 375 A e. 125 A
During its entire motion, the acceleration of a projectile is always g
Indicate whether the statement is true or false