1(a) What frequency ultrasound should be used to see details as small as 1.0 mm in tissue? The speed of sound in tissue is 1540 m/s. Is this a maximum er minimum frequency (b) Given that the maximum effective depth is approximately 400 wavelengths, to what depth is this sound effective as a diagnostic probe? 5.0-MHz ultrasound is used to look for objects in the eve, such as fragments of glass. (c) What is the smallest detail detectable with this fiequency sound, given the speed of ultrasound in tissue is 1540 m/s? (d) is the effective depth of penetration great enough to probe the entire eve? (About 3.0 em is needed.)​

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

Define the terms moral development and moral reasoning.

4.at 0 ºc, some amount of energy is required to change 1 kg of water from a solid into a liquid. if you had a 2 kg piece of ice, what effect would this have on the amount of thermal energy required to change the water from a solid to a liquid? it would require more energy to change solid water into liquid water because there are more molecules in this larger piece of ice. it would still require the same amount of energy to change solid water into liquid water because the entire piece of ice would still gain the same amount of energy in each case. it would require energy to be removed from the 2 kg piece of ice. the larger piece of ice already has more total energy than the smaller piece of ice, so energy must be removed for the ice to become liquid. it would require less energy to change solid water into liquid water because the energy would spread through the ice more quickly and the ice already has a larger total amount of energy because it is larger than a 1 kg piece of ice.