Does a spring scale measure weight or mass? why?

What part of the ear is names after tools, such as the hammer and the anvil?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.

How is the ideal mechanical advantage of a wheel and axle calculated?