Suppose that you fill an ice-cube tray with water from the sink and put the trash in the freezer. The water’s temperature decreases because _.
a. Cool air in the freezer flows into the water
b. Thermal energy flows out of the water into the air in the freezer
c. Water evaporates and moves into the air in the freezer
d. the water contracts at a lower temperature
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Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.