An object is placed 10cm to the right of a double concave diverging lens with a focal distance of 15cm. Using ray tracing:
a) Find the image distance.
b) Give three characteristics of the image (inverted/upright, smaller/larger, virtual/real).​

What are chlorofluorocarbons and what impact do they have on the atmosphere?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Select the correct answer. what does the process of natural selection involve?