What does muscle fibers are contractile mean?

Einstein is probably most known for his equation E = mc2, where E = the energy of a particle of mass = m, and c = the speed of light. If "m" and "c" are in MKS units, what are the MKS units of E?

The sweeping second hand on your wall clock is 24cm long. a) What is the rotational speed of the second hand? b) Find the translational speed of the tip of the second hand. c) Find the rotational acceleration of the second hand.

A dog runs 30 feet to the north then 5 feet to the south what is the displacement of the dog

Why does increasing the number trials increase confidence in the results of the experiment?

Nutrients move into the bloodstream from the digestive system by a process called

What makes the lumbar vertebrae different from the cervical vertebrae and the thoracic vertebrae?

Matter has Certain types of what

Identify the type of relationship that exists between density and temperature

You are standing on the sidewalk and see a bus drive by. What would be an ideal frame of reference? A bird flying overhead A jogger running along the sidewalk A car driving alongside the bus A tree across the street

One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?