Block A is 45 km from Block B. Spring and Autumn start moving from Block A to Block B. Spring cycles 15 km/h and Autumn walks 6 km/h. After arriving at B, spring stays there for 1 hour and comes back. Then he meets autumn in between. How far is it from their meeting place to B

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.