A student is investigating heat transfer. The student places the ends of a curved copper bar into two insulated cups, as
shown below. The copper bar is at 20°C, Cup 1 contains
40°C water and cup 2 contains 20°C water. Each cup
contains the same amount of water.
Part A Describe the direction of heat flow between the cups of water in the first few
minutes of the investigation.
Show your work:

Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.