|Hydroelectric, tidal and fossil fuels are three sources of energy.Which of these are renewable energy sources?
||no yes yes, no no yes, yes no no, yes yes no
|Which would be the least likely to sink into soft ground?
||a loaded lorry with four wheels, a loaded lorry with six wheels, an empty lorry with four wheels, an
|A new liquid is tested to decide whether it is suitable for use in a liquid-in-glass thermometer. It is found that the liquid does not expand uniformly with temperature. What will be the effect of this on the scale of the thermometer?
||It has a short range., It is not linear., The markings are too close together., The markings are to
|The fillings for a hole in a tooth should be made from a material that
||expands more than the hole in the tooth., expands by the same amount as the hole in the tooth., ex
|Heat energy is supplied at the same rate to 100 g of paraffin and to 100 g of water in similar containers. Why does the temperature of the paraffin rise more quickly?
||The paraffin has a larger specific heat capacity than water., The paraffin has a smaller specific h
|The potential difference between the ends of a conductor is 12 V. How much electrical energy is converted to other forms of energy in the conductor when 100 C of charge flows through it?
||0.12 J, 8.3 J, 88 J, 1200 J
|When dealing with radioactive substances there are possible dangers. Which statement is correct?
||Beta-particles can pass through skin and damage body cells., Gamma-radiation is more dangerous than
|A nucleus consists of 90 protons and 144 neutrons. After emitting two beta-particles followed by an alpha-particle, this nucleus has
||86 protons and 140 neutrons., 86 protons and 142 neutrons., 90 protons and 140 neutrons., 90 proto
|Deuterium 2/1 H and tritium 3 / 1H are two isotopes of hydrogen. Compared to a deuterium atom, how many protons and neutrons does a tritium atom have?
||more more, more same, same More, same same