An ideal refrigerator-freezer operates with a cop = 7.0 in a 20°c room. what is the temperature inside the freezer?

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up