Elements from which two groups in the periodic table would most likely combine with each other to form an ionic compound?
O 16 & 17
O 1 & 18
O 2 & 16
O 1 & 13

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

Which of the following are guidelines to follow for obtaining accurate observations