Which microscope is often used to view metal surfaces

Acid rain is the direct result of acid released by burning fossil fuels. select the best answer from the choices provided ot o f true or false

What is the primary goal of human communities?

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy