What are the solutions to those questions in the pics

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

How are isotopes of the same chemical element alike? how are they different?

Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? (2 points) decreasing temperature decreasing pressure decreasing surface area decreasing solute concentration