Carbon dioxide, methane, and nitrous oxide are some greenhouse gases naturally found in our atmosphere. In recent decades the concentration of these gases have been increasing at a steady rate. Why is this happening?

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

What kind of simple machine is a catapult?