Question

A man runs at the speed of 10 Km/ hr. How much time will he take to cover 750 meters? Also express his speed in m/s.

Answer 1

a) Draw the electronic configuration and represent the formation of

magnesium oxide. Write its formula. (Magnesium - atomic number 12,

Oxygen - atomic number 8)

b) Name any two particles emitted during the process of radioactivity.

Answer 2

Hey! Here's your answer!

v = 10 km/h = 10*1000/3600 = 2.77 m/s

s = 750 m = 0.75 km

v = s/t

t = 0.75/10

t = 0.075 h

 = 270 s

Hope this helps! :)