A hollow metal sphere has 6 cm and 9 cm inner and outer radii, respectively. The surface charge density on the inside surface is −100 nC/m². The surface charge density on the exterior surface is +100 nC/m².
What are the strength and direction of the electric field at points 4, 8, and 12 cm from the center?

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 substances that are necessary for producing of certain hormones and that store and transport vitamins

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!