Camden constructs a model of a double convex lens using two clear plastic circles that are round on one side and flat on the other. he attaches the circles at the edges. How does his model look?

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?

During the past 150 years in the united states, how did energy consumption compare to population growth