A scientist studying the blue-ringed octopus made the following observations. It inhabits shallow coral reefs where water temperatures are between 26 °C and 29 °C. It feeds on crabs, shrimp…
The line with equation y = – 2 x + 1 is reflected in the line with equation x = 2 Which of the following is the equation of the…
An escalator between two floors in a shop consists of steps that are each 30 cm high and 40 cm deep.There are 20 steps between the floors.The escalator moves a…
Carboxylic acids react with alcohols to make esters. A small amount of concentrated sulfuric acid is used as a catalyst. Consider the following ester: What is the name of the…
The diagram shows changes in the structure of the uterus lining during the menstrual cycle in a healthy female. Two regions are labelled Q and R. S shows when ovulation…
Five congruent small rectangles are joined, as shown, to form one large rectangle. The large rectangle is mathematically similar to each of the small rectangles. For each small rectangle, find…
A solid cuboid has dimensions 0.20 m × 0.10 m × 0.10 m and density 2000 kg m–3. What pressure is exerted by the weight of the cuboid when it…
An inorganic salt was analysed to determine its composition. The compound gave a lilac flame in a flame test. After dissolving in water and adding sodium hydroxide solution, a green…
A mature active cell in a healthy human has the following features: a cell membrane no nuclear DNA molecules that bind with oxygen.Which of the following statements about this cell…
What is the mean of 12 , 27 and 147 ? Answer: 8) B /12 = √√2 x 2 x 3 = 2√3√27 = 3x3x3 = 3√3147 = √7x7x3 =…