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Q. If an object isn't moving, no external force acts on it.
No it is always not true, there would be balanced forces which cancel each other out leaving no net force. Example: Sitting on a chair, the chair pushes up on you while gravity pulls you down, but you aren't going anywhere because those forces cancel each oyher and net force is equal to zero.
Draw a ray diagram to show the formation of image of an object placed among the optical centre and focus of the convex lens. Write the characteristics of image formed. Using this d
Choroid: Inside the sclera it is thin, non transparent or opaque. Its front part of iris there is an aperture known as the pupil which control amount of light entering the eye.
A simple theodolite or astrolabe A simple theodolite or astrolabe is formed by fixing a drinking straw to the base line of a protractor with sealing wax or glue. A plumb line h
define
The wrench shown in the figure is designed for access to the bolt at O. The wrench lies in a vertical plane and a horizontal force of P27 (as in question 14) is applied at A perpe
There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a
What is phyiscs Physics is a science. Science works according to the scientific method. The scientific method accepts only reason, logic, and experimental evidence to tell amon
Define the Momentum and Impulse. Momentum, p, is a measure of a car's motion. p = m v where p is momentum in kg-m/s, m is mass in kilograms and v is the velocity of the ca
Determine the Charge of the lithium ion A mass spectrometer often is used in carbon dating to verify the ratio of C-14 isotopes to C-12 isotopes in a biological sample. This ra
What are the kinds of energy?
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