Heat from a fire is transferred as the air warmed by the fire rises. Which type of heat transfer is occurring?
A. Refraction
O B. Covection
O C. Conduction
D. Radiation

What is the most useful equation for electric power?

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?