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A force of 2.5kN is needed to lift a load. How much work is done if the load is lifted by 500cm?
An electromagnet exerts a force of 12N and moves a soft iron armature by a distance of 1.5cm in 40ms. Find the power consumed.
A mass of 500kg is raised to a height of 6m in 30s. Find
(a) the work done and
(b) the power developed
B-Infrared (IR) Radiant Heat Heat radiation can be achieved by using infrared (IR) radiation it penetrates about 3mm in the skin. excessive exposure can cause erythema(redden
Two 20-g ?atworms climb over a very thin wall, 10 cm high. One of the worms is 20 cm long, the other is wider and only 10 cm long. Which of them has done more work against grav
Demonstrating the cause of difference in length of day and night in some places:- Use the similar apparatus as in 6 above. Mark a circle on the ball around its centre to show t
Focal length of convex lens is 0.1 m. A liquid lens is formed between a plane surface and one face of this lens of radius of curvature 0.12m. The converging combination formed is f
The block and tackle Let two pupils every grasp a round stick, such as a broomstick, and stand various feet apart. Tie a length of clothes line cord to single of the sticks an
A manufacturer of light bulbs advertises that its 55-W bulb, which produces 800.0 lm of light output, gives almost the similar light as a 60.0-W bulb with an energy savings. Th
Electrical equipment in an office takes a current of 13A from a 240V supply. Estimate the cost per week of electricity if the equipment is used for 30 hours every week and 1kW
Explain the Optical Instruments? The lenses you use most often are the ones in your eyes. The front of your eye has a convex lens whose focal length can be changed by the muscl
The units that may be derived from fundamental units are known as derived units.
Factors which are affect velocity of sound in gaseous medium is (1) Effect of density (2) Effect of pressure (3) Effect of temperature : (4) Effect of humidity
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