Hint | Answer |
The energy required to raise the temperature of 1kg of a substnace of 1K. | |
The situation if the mean density of the universe is less than the critical density. | |
A device that has a greater number of wire turns on the input side than the output side and so reduces the emf and increases the electric current on the output side. | |
The change in wavelength caused by the relative motion between the wave source and an observer. | |
Unit of capacitance. | |
The force between two charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. | |
The energy required to change the state of 1kg of a substance at its boiling point from liquid to gas. | |
The average time taken for the activity of a radioactive source to decrease to one half of its original value. | |
The theory that the universe was created out of nothing from a single point. The universe was once much smaller, hotter and denser. | |
The resultant force on an object, acting towards the centre of the circle causing it to move in a circular path. | |
A particle of antimatter that has the same rest mass but, if charged, the equal opposite charge to its corresponding particle. | |
The process of slitting a large nucleus into two smaller nuclides, often with the emission of several neutrons, | |
An object will remain at rest or continue travelling at a constant velocity unless acted upon by a force. | |
On a large scale the universe is uniform. | |
When body A exerts a force on body B, body B exerts an equal and opposite force on body A. | |
The process when a particle and antiparticle interact and their combined mass is converted to energy. | |
A property of baryons and quarks that is conserved in particle interactions. | |
The use of gamma photons produced when positrons annihilate with electrons inside the body to map out active areas within the body. | |
The process of creating a particle-antiparticle pair from a high-energy photon. | |
A collision where momentum is conserved but kinetic energy is not. | |
When the acceleration of an object is proportional to its displacement and the acceleration is in the opposite direction to the displacement. | |
The property of a material that determines the intensity of ultrasound refracted at a boundary with another material. | |
The frequency of the driving force applied to an oscillating object. | |
The effect whereby x-rays deflected off particles have a longer wavelength than their initial wavelength. | |
The random movement of small particles when suspended in a liquid or gas. | |
A body comprising mainly ice and rock in orbit around a star. | |
The average density of the universe above which the universe will collapse, and below which the universe will expand forever. | |
The use of powerful magnetic fields and the spin of hydrogen atoms within the body to produce a detailed image of the internal organs. | |
A particle that has a charge due to loss or gain of an electron. | |
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