In which of the following methods of heat transfer is it necessary for the objects to be directly touching one another

Explain how you might determine the rate of weathering on a sample rock

Lois and clark own a company that sells wagons. the amount they pay each of their sales employees (in dollars) is given by the expression 12h+30w12h+30w12, h, plus, 30, w where hhh is the number of hours worked and the number of wagons sold. what is the amount paid to an employee who works 666 hours and sells 333 wagons?

Explain how a credit card works when a customer makes a purchase