A boy releases his balloon, which slowly rises into the sky. if the balloon has a diameter of 20.0 cm when the child releases it, what is its diameter at a height of a) 1,000 m, b) 2,000 m, and c) at 5,000 m? assume that the balloon is very flexible and that you can neglect the surface tension

Astate of matter all that has define volume and can flow is a(n)

What is the temperature in degrees celsius of a substance with a tempature of 49k

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.