Calculate the percentage by mass of Calium ions and bromide lons, which make up compound (caBr). Use the Following molar masses for Simplicity Mm (ca) = 40g. mol-¹,Mm(Br)=80g. mol-¹​

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.