What quantity of work, in joules, is required to lift a 25.0 pound (11.4 kg) book bag from the floor to your lab bench, which is 4.50 feet (1.38 m) from the floor?

If the same amount of cacl2 is added to equal volumes of water and maple syrup, which will have the higher temperature?

What’s the scientific notation for the number 6,840,000,000

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?