An apple is dropped out of a 12 meter-high tree. how fast will the apple be moving right before it hits the ground

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel