Which one of the following statements about ∝ particles is NOT true?
The lowest and the highest frequencies a typical young person′s ear can detect are approximately:
A certain nucleus has 12 protons and 16 neutrons.Which one of the following statements about the nucleus is NOT true?
Which one of the following is NOT a magnetic material?
A detector close to a sample of radioactive material records 76 counts per second (cps). Precisely 2 days later the count rate has fallen to 22 cps.The count rate due to background radiation, taken immediately before and after the experiment, averaged 4 cps. The half-life of the material is:
The nucleus of a carbon atom has six protons and eight neutrons.Which one of the following describes it?
You look through a microscope to view the Brownian motion of smoke in a container of air. Which one of the following statements is NOT true?
A ripple travels over the surface of some water. Its wavelength is 2 m, its amplitude is 0.1 m and its frequency is 0.5 Hz.The speed of the ripple is:
Two separate forces are acting on a bar to cause it to rotate clockwise. One force is 20 N, at a distance of 3 m out from the pivot; the second force, 2 m further out, is 10 N. Their combined moment is:
Which one of the following is NOT a vector quantity?
Which one of these statements is true for ALL electromagnetic waves?
Which one of the following would NOT give rise to a systematic error in an experiment?
In which one of the following four cases would the pressure be greatest?
The units of specific latent heat are:
A force of 100 N starts to act on a body of mass 20 kg which is initially at rest. After 10 s its velocity will be:
Dividing 9 × 10-2 by 3 × 10-8 gives:
A loudspeaker emits a steady note.A girl sings a note which is of lower pitch but higher volume. The sound wave she is producing has:
Which one of the following statements about an ammeter is NOT true?
Two resistors, one of 4 Ω and one of 6 Ω, are connected in parallel.Their combined resistance is:
The splitting of a beam of white light into the colours which make it up is called:
The following statements refer to the laminated core of a transformer. Which one of them is NOT true?
The graph shows the results of an experiment to investigate
the relationship between the voltage placed across a light bulb
and the current which then flows through it.Which one of the
following statements is NOT true?
A dynamo connected to a circuit is being turned.Which one of the following would NOT generate a greater e.m.f.?
What would be the best materials to use for making the coil and the core of an electromagnet?
Which one of the following statements about light passing down an optical glass fibre is NOT true?
The following statements describe a magnetic field plot, showing the lines of force.Which one is true?
Which one of the following statements about diffraction is true?
The air temperature on a particular day is 27 ℃. An air bubble trapped in a tube by a thread of liquid is able to expand freely if it is heated.At what temperature would you expect the volume of the air bubble to double?
Which one of the following statements about a voltmeter is NOT true?
Which one of these four statements is NOT true?
The following statements describe the molecules in a gas at around room temperature. Which one is NOT true?
In Fleming's Left Hand Rule describing the motor effect, the directions are:
A lens forms a real image of magnification ×3.Which one of the following statements is NOT true?
An electron, with its charge of 1.6 × 10-19 C, is moved from one place at +8 V to a different place which is at 0 V.The energy released will be:
Sweating can help to cool the body. This cooling is achieved mainly by:
A 10 V battery delivers a steady current of 2 A. How long will it be before 1.0 kJ of energy is supplied to the circuit?
A girl whose weight is 250 N walks up a slope 40 m long onto a platform 3 m high. Her gain in gravitational potential energy is:
The method by which certain uranium and plutonium nuclei can release energy in a reactor is known as:
When a metal wire carries an electric current, charges flow through it.The moving charges are:
The specific heat capacity of a particular liquid is 3000 J kg-1 K-1. A large beaker containing 2 kg of the liquid has to be warmed from 25 ℃ to 35 ℃. A 100 W heater is used. If all the thermal energy could be transferred to the liquid, how long would it take?
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