How is the AHfusion used to calculate the mass of solid that 1kJ of energy will melt?
O A. 1kJ * AHfusion * g/mol solid
O B. 1kJ * 1/AHfusion * mol/g solid
O C. 1kJ * 1/AHfusion * g/mol solid
O D. 1kJ * AHfusion * mol/g solid

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Which of the following are sources of revenue for media companies? a. direct sales to producers b. advertising and subscriptions c. online purchase d. capital investments

What is the work done by the electric force to move a 1 c charge from a to b?