Quantities associated with a moving vehicle include its velocity, speed, momentum and kinetic energy. Which of these quantities will always change if the vehicle changes direction? Answer: 11) E Speed…

Iron is extracted from iron ore (which contains Fe2O3) using carbon monoxide. This overall reaction is slow and so must be heated. The chemical equation for this reaction under certain…

A sample of healthy human cells contains 4 cells. After they were allowed to divide 5 times using the same type of cell division, there were 128 cells in the…

My wallet contains two 50p coins and five 20p coins only. I need 70p to buy an item. If I pick two coins at random from my wallet, what is…

A wave travelling through a material has a frequency of 50 Hz and a wavelength of 0.40 m. How long does it take the wave to travel 100 m through…

The diagram below shows the apparatus that can be used in fractional distillation. Which of the following statements is/are correct about the process shown in the diagram?1 Covalent bonds between…

The diagram shows part of the nitrogen cycle. Which of the numbered arrows represent(s) denitrification? Answer: 5) A In Denitrification, nitrate ions are reduced to produce nitrogen gas (N2). This…

Which one of the following is a simplification of 48 m5 p / 40m2 p3 ? Answer: 4) B 48/40 = 6/5 m5 ÷ m2 = m3p ÷ p3 = p-2 The simplification…

Here are four statements about light:1 In a vacuum, green light travels faster than blue light.2 In a vacuum, the wavelength of red light is greater than the wavelength of…

Elements Q and Z are shown in the Periodic Table as: What is the empirical formula and bonding type of the compound formed between these elements? Answer: 2) C Q…