Who was the first person to observe a sign of molecular motion?

An 18.8 kg block is dragged over a rough, horizontal surface by a constant force of 156 N acting at an angle of angle 31.9◦ above the horizontal. The block is displaced by 19.9 m, and the coefficient of kinetic friction is 0.209. a.

How can Ethan best defend his conclusion?

What limits current flow or the opposition to the movement of electrons?

An 18-mm-wide diffraction grating has rulings of 710 lines per millimeter. monochromatic light of wavelength 506 nm wavelength is incident normally on the grating.

Select the sources of tax revenue for federal, state, and local governments. Select all that apply. personal income sales payroll education

2) A window washer pulls themselves upward using a bucket pulley apparatus. A) How hard must pull downward to raise herself slowly at a constant speed? B) If she increases this force by 15%, what will her acceleration be?

A star with an original mass of 8 to 25 solar masses will ultimately become a? a) red giant b) white dwarf c) neutron star d) main sequence star

Racewalking involves more impact than running. true false

Why would an object float in water, but sink in rubbing alcohol?

What happens to the volume of solids, liquids, and gases when they are heated. Devise your own chart for your answer.