## How to make a simple pulley, Physics

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How to make a simple pulley

A reasonably satisfactory pulley can be complete from a wire clothes hanger and a cotton reel. Cut off both wires of the hanger at a distance of about 20 cm from the hook. Bend the ends at right angles and fall both by a spool. Adjust the wires so that the spool turns simply and then bend the ends down to keep the wires from spreading. #### Kinetic and potential energy, Kinetic and potential energy: Energy can ...

Kinetic and potential energy: Energy can exist in of 2 main forms. Kineti c energy is the kind of energy you probably think of right away when you imagine the energy. A pers

#### Fibre optics, Fibre optics: Light travels in straight lines, even thoug...

Fibre optics: Light travels in straight lines, even though lenses and mirrors can deflect it, light still travels in a straight line between optical devices. This is fine for

#### Determine the change in entropy, Determine the change in entropy, in joules...

Determine the change in entropy, in joules, when 5 moles of an ideal gas expands from a value of 4 lits. to 40 lits. at 27°C. (R = 8.314 JK -1 mol -1 )

#### Electric potential , As we know that"The electric potential at a certain po...

As we know that"The electric potential at a certain point inside the electric field is defined as the amount of work done in bringing a unit positive test charge uniformly (without

#### Work Power and Energy, How do I write the equation and units for work for ...

How do I write the equation and units for work for the following question: How much work does Bobby perform in pushing a 35N crate a distance of 4 meters?

#### Explain potential energy, The energy possessed by a object by virtue of its...

The energy possessed by a object by virtue of its position or its configuration is called its potential energy. Concept of potential energy is valid only in conservative field.

#### Alpha-particle and a proton have the similar kinetic energy, An electron, a...

An electron, an alpha-particle and a proton have the similar kinetic energy. Which one of these particles has the main de-Broglie wavelength?

#### Determine the minimum amount of heat, A house is air conditioned using sola...

A house is air conditioned using solar energy. Solar radiation heats a pressurized tank such that the temperature is maintained at 175 o C. 1500 kJ must be extracted from the hous

#### In a plot of photoelectric current versus anode potential, In a plot of pho...

In a plot of photoelectric current versus anode potential, how does 1. The saturation current varies with anode potential for incident radiations of dissimilar frequencies but s

#### Determine the maximum amount of power, Water accelerated by a nozzle to 20 ...

Water accelerated by a nozzle to 20 m/s strikes the vertical back surface of a cart moving horizontally at a constant velocity of 5 m/s in the flow direction. The mass flow rate of  