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Example 1 - A bird feeder in your yard has a total mass of 3.0 kilograms and is supported as shown. What is the force on the top wire?
The bird feeder is not falling so the forces must be balanced - no resultant force in any direction. Looking up and down, the only force upwards is the force on the top wire and the only force downward is the weight of the bird feeder. So the free body diagram would look like:
Example 2 - If you pull on a 20 kg crate with 20 N, the crate will not move, because this force just balances the frictional force. If a little more force will start the crate moving what would the coefficient of friction have to be?
An isotope of iodine (Z = 53) is used to treat thyroid conditions. Its mass number is 131. How many neutrons are in its nucleus? 131 - 53 = 78 neutrons
Depending on the material of the resistance element, resistors are classified into linear resistors and non linear resistors. Majority of the resistors used in electronic circuits
Two trains simultaneously leave the same train station at noon. One train travels north and the other travels south. The position-time graph or both trains is shown in the accompan
Q. On what factors does the amount of optical rotation depend? The amount of optical rotation relay on (a) Thickness of crystal (b) Density of the crystal or else concent
The Saturated calomel electrode (SCE) is a reference electrode based on the reaction among elemental mercury & mercury (I) chloride. The aqueous phase in contact with the mercury a
A horizontal power line carries a current of 6110 A from south to north. Earth's magnetic field (86.8 mT) is directed toward the north and is inclined downward at 70 degrees to the
Huygens' construction; Huygens' principle (C. Huygens): The mechanical propagation of any wave (exclusively, of light) is equal to supposing that each point on the wavefront b
which circular path in any time in any mation
Bug on a Bowling Ball A bug sitting on top of a bowling ball begins to slide o? with negligible friction. Conclude the angle at which the bug leaves the surface. This proble
What do you mean by dispersion? Describe a physical quantity which depends only on the material of the prism for its dispersion. Get an expression for it.
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