Which of the following scientist suggested that moving particles exhibit wave properties?
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Which of the following scientist suggested that moving particles exhibit wave properties?
Which of the following factors is not among that determines the resistance of a wire?
If the relative humidity of the atmosphere increases, the rate of evaporation of sweat from the human body?
Which of the following set of quantities have members which are all vectors?
According to Pascal's principle, the pressure in a fluid is always?
A note produced by an instrument is distinguished from a similar note produced by another instrument by the?
Which of the following statements about distance and displacement is not correct?
The electrons in a cathode-ray tube are produced by?
Which of the following statements is not a characteristic of a plane progressive wave?
A stone is thrown horizontally with initial velocity 15m/s from a tower 20 m high. How long does it take to reach the ground? [g= 10m/s\(^2\)
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The following statements about a loudspeaker are correct except?
A radioactive material has a half-life of 1.0 hour If 200.0 g of it was present at 6 a.m. on a certain day, how many grams will have decayed by 9 a.m. on the same day?
An electric circuit consists of a resistor. a battery and a key. If the voltage of the battery is increased, there Would be an increase in the?
A force of 10 N, acting continuously, increases the kinetic energy of an object from 20.J to 60 J. Find the distance moved by the object.
A rotating disc contains a set of holes in a circle. An air jet is directed onto the holes and a note of frequency 480 Hz is produced. If the number of holes is 20, calculate the speed of rotation of the disc.
A man weighing 200 N runs up a staircase in 5s. If the height of the staircase is 9 m, calculate the power of the man.
Which of the following statements best describes the particles in a solid at room temperature? They are
A wire of cross-sectional area 2π x 10\(^-{8}\) m\(^2\) and resistivity 1.1 x 10\(^-{8}\) Ω m, has a resistance of 21Ω.
Calculate the length of the wire. [π=22/7]
In the diagram above, a bulb is lit by drawing 2.0A from 440V a.c. source. Calculate the cost of keeping the bulb on for two days at $0.40 per kilowatt-hour.