Which requires more work, carrying a 420 N knapsack up a 200 m hill or carrying a 210 knapsack up a 400 m hill? Why?

The temperature - 273°C is -. O A. - 40°C O B. OK O C. the temperature at which all motion is at a minimum O D. absolute zero

Which laboratory activities involve chemical changes? Check all that apply. leaving a copper penny in vinegar until it turns green boiling saltwater for several minutes until only solid salt remains extracting iron filings from a sand mixture using

If a single strand of DNA were stretched out, how far would it reach?

Assume a solar cell would produce a current of 500mA and 3 V. What is the power of this solar cell?

Which of the following would decrease the mechanical advantage A) a fulcrum B) a fixed pulley C) friction D) heat

Which practice fits the definition of conservation? using more of a mineral resource than needed not using a necessary mineral resource at all mining a mineral without regard to the surface soil and vegetation above it recycling cans that contain a

The word family implies that the elements in a family have like properties. What property do the elements of the noble gas family all share?

What is the energy of an object because of its potential and kinetic energies? A.) chemical energy B.) electrical energy C.) nuclear energy D.) mechanical energy

If the volume of a hot air balloon remains constant, what happens as the temperature of the air inside the balloon increases?

What is the correct formula for electrical power? l