:((( please, i need help

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .