A cup of hot coffee at a temperature of 80 C is left out on a table top. The surrounding air has a temperature of 25 C (room temperature). After one hour on the table top: * A. The coffee will absorb the heat from the air and become hotter
b. the heat will flow from the coffee to the surrounding air.
C. the coffee will freeze and become solid.

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Explain the consequences of this addiction to the brain tissue