A crowbar of 2m length is pivoted about 40cm from its tip and load of 800N is lifted by applying an effort at the other end. Calculate effort, M.A.,V. R.,efficiency.

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)