a 200 g cooper calorimeter contains 150 g of water at 20 °c. the water is added 250 & of aluminum at 100° c. find the temperature of the system after equilibrium is established. (given c = 390 j/kg*c, c-4186 1/kg"c, c.-900 j/kg*c)​

A10 kg box initially at rest is pulled 18 meters across a horizontal, frictionless surface by a 40 n force. what is the block’s final velocity over the 18 meters?

Photons with the highest energy have the longest period

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?