PLEASE HELP How much power is required for a pulley to accelerate a 2,000 kg rollercoaster 5 m/s² a distance of 150 meters up a hill in 30 seconds to a height of 100 meters? What is the rollercoaster's velocity as it races down the hill? Show your work

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)