Based on their locations on the periodic table, which two elements would you expect to form positive ions with a +1 charge? A. Hydrogen, H
B. Chlorine, CI
C. Fluorine, F
D. Lithium, Li

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?