Why do lighthouses use lenses?

A 40g sample of polyisoprene, which has a specific heat capacity of f 1.88 J 1.°c, is dropped into an insulated container containing 100g of water at 55C and a constant pressure of 1 atm. The initial temperature of the polyisoprene is 1.5C.

Place the lunar phases in the correct order

Acid base neutralization reactions (e. g. titrations can be considered to go to completely to the right (to products.

Rocks formed by changes in heat and pressure or the presence of hot, watery fluids

What if you drop a small magnet repeatedly it become demagnetized. explain. what is happening sub-atomically?

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed

Standard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Which compound is inorganic? a. glucose (c6hl2o6) b. carbon dioxide (co2) c. ethane (c2h6) d. stearic acid (cl8h36o2) ?

Pure aluminum metal has a density of 2.70 g/cm

A 0.250-g chunk of sodium metal is cautiously dropped into a mixture of 50.0 g of water and 50.0 g of ice, both at 08C. The reaction is 2Na (s) 1 2H2O (l) 88n 2NaOH (aq) 1 H2 (g) DH 5 2368 kJ