Ahydraulic lift is used to jack a 970 kg car 12cm off the floor . the diameter of the output piston is 18cm and the input force is 250n. (a) what is the area of the input piston? (b) what is the work done in lifting the car 12cm? (c) if the input piston moves 13cm in each stroke how high does the car move up for each stroke? (d) how many strokes are required to jack the car up 12cm? (e) show that energy is conserved

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.

What is the magnitude of the gravitational force acting on the earth due to the sun?

Gravity is pulling an object into the sun. the closer the object gets to the sun, the greater the gravitational force that acts on the object, increasing its acceleration. a line graph plotting the speed of the object against time would have which shape? a: straight line of positive slope b: curved line that slopes upward c: curved line that slopes downward d: straight line of negative slope