This is Elvira and her toy car. She pushes the plastic toy car to set it in motion. Which force is NOTacting on the car? A. Pulling force from gravity B. Pushing force from her hand C. Magnetic force from the north pole D. Friction between the wheels and the surface

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

What best discribes the relationship between wavelength and frequency in a electromagnetic wave

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.