w1 > w2
there is more upthrust in water then air.
Kavungya answered the question on May 27, 2019 at 04:52
- A body of a mass 0.6 is attached to the end of a string of length 50 cm and whirled in a
horizontal circle. If the...(Solved)
A body of a mass 0.6 is attached to the end of a string of length 50 cm and whirled in a
horizontal circle. If the tension of the string is 96 N. Determine the velocity of the body.
Date posted: May 27, 2019. Answers (1)
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An object of density 9 x 102 and mass 1.8 kg is completely immersed in water. Calculate the mass of water displaced in kg. (Take density of water as 1000 kg / m3)
Date posted: May 27, 2019. Answers (1)
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Date posted: May 27, 2019. Answers (1)
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Date posted: May 27, 2019. Answers (1)
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A water pipe of diameter 4.4 cm is connected to another pipe of diameter 1.1 cm. The speedof the water in the smaller pipe is 4 m/s. What is the speed, V1 of water in the larger pipe?
Date posted: May 27, 2019. Answers (1)
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Date posted: May 27, 2019. Answers (1)
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The weight of an object on earth is 40 N. If the object weighs 35 N in another planet, determine the gravitational field strength at that planet. (Take g = 10 N/kg)
Date posted: May 27, 2019. Answers (1)
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Date posted: May 27, 2019. Answers (1)
- Figure below shows circular waves approaching a concave reflector.
Show the reflected waves.(Solved)
Figure below shows circular waves approaching a concave reflector.
Show the reflected waves.
Date posted: May 25, 2019. Answers (1)
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i) A 2000W...(Solved)
Calculate the cost of using the following appliances in one month (30 days ) if the company rate is ksh. 9.50 per unit.
i) A 2000W water heater for 2 hours per day.
ii) A 75W bulb for 10 hour per day.
iii) A 1500W electric iron for 1 hour per day.
Date posted: May 25, 2019. Answers (1)
- A transformer with 2000 turns in the primary circuit and 150 turns in the secondary circuit has its primary circuit connected to a 800V a.c...(Solved)
A transformer with 2000 turns in the primary circuit and 150 turns in the secondary circuit has its primary circuit connected to a 800V a.c source. It is found that when a heater is connected to the secondary circuit, it produced heat at the rate of 1000W. Assuming 100% efficiency, determine the;
i) Voltage in the secondary circuit.
ii) Current in the primary circuit.
iii) Current in the secondary circuit.
iv) State the type of transformer represented above.
Date posted: May 25, 2019. Answers (1)
- The table below shows part of the electromagnetic spectrum in order of decreasing wavelength.
a) How are waves C produced?
b) State one use of the...(Solved)
The table below shows part of the electromagnetic spectrum in order of decreasing wavelength.
a) How are waves C produced?
b) State one use of the wave D.
Date posted: May 25, 2019. Answers (1)
- A boy watching fireworks display sees the light from an explosion and hears the sound 2.5 seconds later. Determine how far is the explosion. (Speed...(Solved)
A boy watching fireworks display sees the light from an explosion and hears the sound 2.5 seconds later. Determine how far is the explosion. (Speed of sound in air 330m/s).
Date posted: May 25, 2019. Answers (1)
- Figure below represent an object O placed 5cm infront of a convex mirror. F is the focal point of the mirror.
Draw rays to locate the...(Solved)
Figure below represent an object O placed 5cm infront of a convex mirror. F is the focal point of the mirror.
Draw rays to locate the position of the image.
Date posted: May 25, 2019. Answers (1)
- Figure below shows a path of a ray of light through a rectangular block of Perspex placed in air.
Calculate the refractive index of Perpex.(Solved)
Figure below shows a path of a ray of light through a rectangular block of Perspex placed in air.
Calculate the refractive index of Perpex.
Date posted: May 25, 2019. Answers (1)
- An electric heater is found to have a resistance of 950 ohms when operating normally on a 240V mains. Find the power rating of the...(Solved)
An electric heater is found to have a resistance of 950Ω when operating normally on a 240V mains. Find the power rating of the heater.
Date posted: May 25, 2019. Answers (1)
- Figure below shows a ray of light incident along the normal. The mirror is rotated at an angle of 15o in a clockwise direction without...(Solved)
Figure below shows a ray of light incident along the normal. The mirror is rotated at an angle of 15o in a clockwise direction without changing the position of the incident ray,
Determine the angle between the reflected ray and the incident ray.
Date posted: May 25, 2019. Answers (1)
- The figure below shows the supply of d.c. to a resistor, R through a diode, D.
Give the bias of the diode.(Solved)
The figure below shows the supply of d.c. to a resistor, R through a diode, D.
Give the bias of the diode.
Date posted: May 25, 2019. Answers (1)
- In the circuit diagram in figure 3 below, the voltmeter and ammeter read 4v and 40mA respectively.
Determine the resistance of the diode.(Solved)
In the circuit diagram in figure 3 below, the voltmeter and ammeter read 4v and 40mA respectively.
Determine the resistance of the diode.
Date posted: May 25, 2019. Answers (1)
- The figure below shows water waves of different wave length incident on aperture which is greater than the wavelength of the wave.Complete the diagram...(Solved)
The figure below shows water waves of different wavelength incident on aperture which is greater than the wave length of the wave.
Complete the diagram to show the pattern of the wave beyond the aperture.
Date posted: May 25, 2019. Answers (1)