When a moving automobile stops for a stoplight, its kinetic energy
a. completely disappears.
b. is converted to thermal energy.
c. is transferred to the pavement.
d. is stored in the automobile's battery.
e. is stored in a flywheel.
B
You might also like to view...
A 320-kg satellite experiences a gravitational force of 800 N. What is the radius of the satellite's orbit? (Earth's radius is 6,400 km.)
A. 6,400 km B. 12,800 km C. 19,200 km D. 25,600 km
Inside the same room, buoyant force is greater on
A) a helium-filled party balloon. B) an elephant. C) both the same
The cause of the pulsations we see in the light from neutron stars is
A) the in and out pulsations of star's radius, as the star gets rapidly larger and then smaller. B) pulsations of its neutrons. C) the spinning motion of the star. D) motions of electrons within the star. E) Nonsense--neutron stars do not pulsate.
Research has shown that Arctic plants are more injured by increased ultraviolet radiation than by global warming (see Ch. 17)
(77) The authors of the study say "there is a growing belief that ozone depletion is of only minor environmental concern because the impacts of UV-B radiation on plant communities are often very subtle. Here we show that 5 years of exposure of a subarctic heath to enhanced UV-B radiation both alone and in combination with elevated CO2 resulted in significant changes in the C:N ratio and in the bacterial community structure of the soil microbial biomass." What might this mean about the future Arctic ecology? Explain.