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A vertical wire with a diameter of 3.60 mm and an unstretched length of 4.25 m extends by a distance of 9.19 mm when it is loaded with a 60N weight.
Calculate the strain in the wire
Determine the direction of maximum increase of the scalar field
f(x,y,z) = xey + z2
at the point O(1,ln2,3)
- a beam LO weighing 50N rests against a wall, the lower part of the beam extending 15 m from the base of the wall. Calculate the minimum value of the force F that can be applied to keep the beam in equilibrium. The coefficient of friction at L and O is 0.30. Height from the bottom of the ground up to the top of the ladder is 30m. F is not at the middle of the ladder. The componenets acting on the top the ladder are RL and NL. The componenets acting on the top the ladder are R0 and N0. The distance of force F from the ground is 10m.
Compared to the number of free electrons in a conductor, the number of free electrons in an insulator of the same volume is less, greater or same
Calculate the mass of air in a 100m of floor dimension 10m×12m and height 4m. Take density of air =1.2kg/m^3
A plane is travelling at 200 ms-1 following the curve of a vertical circle.
If the passengers experience weightlessness at the top of its flight path, what is the radius of the circle?
A student reads the mass on an electronic balance to be 1.34 g with 2% percentage uncertainty.
What is the correct measurement and uncertainty?
A 15-kilowatt motor is used to hoist an 800 kg bucket of concrete to the 20th floor of a building under construction to height of 90 m. assuming no energy is lost along the process, how much time is required?
An installation requires 35KW and operates at a power factor of 0.45 from a 400v 3 phase supply what is the current taken by installation at the normal power factor 0.45
current taken at power factor 0.75
current taken at power factor of 0.9
Ab object is placed at a distance 'U' from a converging lens produced a virtual image 33cm from the object. If the magnification is 4, calculate the:
a)value of U
b)Focal length of the lens
c)Power of the lena
