In triangle PQR<QPR = 60 <PQR = 45< QRP = 75RQ = 6 units Given that cos 60 is ½, find the length of side PR. (The diagram is not…

The enamel on teeth treated with fluorine may include fluoroapatite, which contains Ca^2+,PO4^3- and F^- ions. Which one of the following is a possible formula for fluoroapati Answer: 28) C…

A parachutist falls from an aircraft and reaches a terminal velocity. After a while he openshis parachute and reaches a new (lower) terminal velocity. Which graph shows how the air…

The bar charts X and Y show the concentration of five substances in the blood before andafter passing through two organs. What are the organs X and Y through which…

Simplify{[2x^3/2 y^3]/√Z}^2 Answer: 25) B Let us solve this question in portions. (2x^³⁄₂)² = 4x³ (y³)² = y⁶ (√z)² = z So the simplification would be: 4x³ y⁶   z

Which set of events occurs during exhalation? Answer: 24) C The process of exhalation or expiration is as follows: volume of thorax decreases (rule out options B and D)  pressure…

The reactivity of the alkali metals (group 1) increases as the atomic number increases.Which one of these statements is the correct explanation of this fact? Answer: 23) E As we…

In an a.c. generator driving a resistive load a coil is rotated slowly between the poles of amagnet. Which of the following will increase if the coil is rotated more…

Diagrams 1 to 5 show five types of levers. Diagram 6 shows the bones of the arm with arrows showing its movement up and down. Which two levers would be…