It is known that 28 g of a certain ideal gas occupy 22.4 liters at standard conditions (0◦ C, 1 atm). The volume occupied by 42 g of this gas at standard conditions is:

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?