Every spring has an equilibrium position. Which statements describe a spring at its equilibrium position ? Check all that apply. The spring constant is zero.

The elastic potential energy is at a maximum.

The elastic potential energy is zero

The displacement of the spring is at a maximum.

The net force acting on the spring is zero.

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

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)