polystyrene has dielectric constant 2.6 and dielectric strength 2.0 × 107 v/m. a piece of polystyrene is used as a dielectric in a parallel-plate capacitor, filling the volume between the plates.

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good