19. Use a scale ray diagram to find the image position of an object that is 30 cm to the left of a convex lens with
a 10-cm focal length.

Asample of a gaseous substance changes into a liquid

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

The softest and hardest minerals are: softest hardest