Which of the following is a heterogeneous mixture? a. salt b. dye in water c. sugar water d. a garden salad

With i really need the correct answer!

Rohit is trying to tune an instrument

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?