Quantities that are pure numbers

Why is it important that the mouth and stomach are near the start of the digestive system? thx

Two equal mass carts approach each other with velocities equal in magnitude but opposite in direction. Friction can be neglected. If the carts collide completely inelastically, what will be the final velocity of the combined system?

1) A. 75 disk rolls down a 10M ramp. How many revolutions does it complete. 2) A uniform solid disk starts at 52 rad/s. To rest, it does 3900J of work. It has a radius of 1.2M.

A box of mass 14 kg sits on an inclined surface with an angle of 52degrees. What is the component of the weight of the box along the surface?

A 10n falling object encounters 4n of air resistance. what is the net force on the object?

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.

Read the given list of organisms. squirrel, zebra, tortoise, rabbit, horse What best describes the role of these five organisms in a food web?

What are the SI units for specific heat capacity

What are starburst galaxies and what do they have to do with galaxy evolution?