The theory of global warming states that the average temperature of the earth has been increasing over time.
a. allow the measurement of the earth’s temperatures at the poles.
b. reveal how the earth’s temperature has fluctuated in the past.
c. reveal how the earth’s temperature varies from location to location.
d. allow the measurement of the earth’s temperature with greater precision.

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

This is the number of complete movements of a wave per second.