Ian walks 2 km to his best friend's house, then walks 0.5 km to the library. he then makes a 2.5 km walk home. the entire walk took him 3 hours. what is his average speed in km/h?

Ian's average speed in km/h = 1.66

Explanation:

  We know that average speed is the ratio of distance traveled and time taken for that distance to cover.

  In this case Ian walks 2 km to his best friend's house, then walks 0.5 km to the library. He then makes a 2.5 km walk home.

  So total distance traveled = 2+0.5+2.5 = 5 km

  Time taken for this 5 km distance travel = 3 hours

  So average speed = 5/3 =1.66 km/hour

  Ian's average speed in km/h = 1.66

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2