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.

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

Which of the following is most likely to be the best conductor of electricity? oxygen chlorine aluminum chromium