Forces and Motion:Question 1 A rider on a bicycle travels north for 1.5 hours and covers a distance of 18

kilometers. What is the velocity of the bicycle?

Velocity = 12 km/h

Explanation:

Velocity can be defined as the division between distance traveled and the time it took for that distance to be traveled:

With the above information in mind, we can calculate the velocity of the bicycle:

Thus the velocity of the bicycle is 12 kilometers per hour.

right

explanation:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.