A man on a bench will exert the greatest pressure on the bench when he
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2019
A siren having a ring of 200 hole makes 132 rev/min. A jet of air is directed on the set of holes. Calculate the frequency and wavelength in air of the note produced (take v = 350m/s)
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2019
A mixture of blue and red pigment when illuminated by white light will appear
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2019
When water is boiling, it
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2019
The lead-acid accumulator consists of
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2019
The momentum of a car moving at a constant speed in a circular track
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2019
According to kinetic molecular model, in gases
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2019
The following are parts of the eyeI. RetinaII. PupilIII. IrisThe correct equivalent in the camera in the same order are
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2019
The earth's gravitational field intensity at its surface is about(G = 6.7 × 10\(^{-11}\)Nm\(^2\)/kg\(^2\), mass of the earth is 6 × 10\(^{24}\)kg, radius of the earth is 6.4 × 10\(^6\)m, g on the earth = 9.8m/s\(^2\))
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2019
Which of the following media allow the transmission of sound waves through them?I. airII. liquidIII. solids
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2019
The conductivity of gases at low pressure can be termed asI. hot cathode emissionII. thermo ionic emissionIII. cold cathode emissionIV. Field emission
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2019
In the molecular explanation of conduction, heat is transferred by the
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2019
The statement 'Heat lost by the hot body equals that gained by the cold one' is assumed when determining specific that heat capacity by the method of mixtures. Which of the following validates the assumption?I. Lagging t…
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2019
During the transformation of matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because
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2019
The limiting frictional force between two surfaces depends onI. the normal reaction between the surfacesII. the area of surface in contactIII. the relative velocity between the surfacesIV. the nature of the surfaces
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2019
An alternating current can induce voltage because it has
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2019
A thermocouple thermometer is connected to a millivoltmeter which can read up to 10mV. When one junction is in ice at 0°C and the other is steam at 100°C, the millivoltmeter reads 4mV. What is the maximum temperature whi…
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2019
A vibrator causes water ripples to travel across the surface of a tank. The wave travels 50cm in 2s and the distance between successive crests is 5cm. Calculate the frequency of the vibrator
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2019
A supply of 400V is connected across capacitors of 3μf and 6μf in series. Calculate the charge.
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2019
The diagram above represents the stress-strain graph of a loaded wire. Which of these statements is correct?