15. An object is placed 16 cm from a convex spherical mirror of radius -9.0 cm. What type of image forms, and at what distance from the mirror?
real image, 3.5 cm from the mirror
virtual image, 8.9 cm from the mirror
virtual image, 5.8 cm from the mirror
virtual image, 3.5 cm from the mirror

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Smallest intensity of a stimulus that you can detect 50 percent of the time is