Determine the instantaneous frequency in Hz of each of the following signals: (a) 10 cos200 /3 (b) 10 cos20 (c) 10 cos20 sin 2 (d) cos200 cos5 sin 2 sin200 sin5 sin 2 (e) 10 exp200 1 √

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2