It is easier to roll a barrel full of coal tar than to pull it because
Options: the full weight of the barrel comes into play when it is pulled, the rolling friction is much less than the sliding friction, more surface area of the barrel is in contact with the road when it is pulled, coal tar is a liquid and it flows in the barrel when it is rolled
One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?
Options: Having waited a day, it is too late to take an antibiotic, You need an antiseptic, not an antibiotic, You need to be vaccinated instead of taking an antibiotic, You are infected by a virus
Olympic emblem is composed of five intertwined rings, each of a different colour, representing the five continents of the world as
Options: Blue ring - Europe; Yellow ring - Asia; Black ring - Africa; Red ring- America; Green ring - Oceania, Blue ring - Asia; Yellow ring - Europe; Black ring - Oceania; Red ring- Africa; Green ring - America, Blue ring - Europe; Yellow ring - Asia; Black ring - Africa; Red ring- Oceania; Green ring - America, Blue ring - Asia; Yellow ring - Europe; Black ring - Africa; Red ring- America; Green ring - Oceania