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The thin-walled tube of mass m rotates around its axis and next to it there
Such a tube is initially stationary on a rut
horizontal (drawn) .Friction coefficient between all adjacent surfaces
and equal
μ =2
. Calculate the motion acceleration of the original tube
No friction on horizontal surface
the two plates are the same (drawing). Symbols of lines and
angular velocity as the side, dimensions R and r (R> r), va
Touch is elastic. Determine the rear disc speed
touch.
A fisherman passes the time by counting waves passing under his boat. He notices that his boat rises and falls 8 times in 65 seconds. He counts 6 wave crests between his boat and a buoy located 54 m away. What is the speed of the water waves?
Explain Lorentz invariance of Dirac equation . Deduce the condition for the invariance
A fisherman passes the time by counting waves passing under his boat. He notices that his boat rises and falls 8 times in 65 seconds. He counts 6 wave crests between his boat and a buoy located 54 m away. What is the speed of the water waves?
Through a refinery, fuel ethanol is flowing in a pipe at a velocity of 1 m/s and a pressure of 101300 Pa. The refinery needs the ethanol to be at a pressure of 2 atm (202600 Pa) on a lower level. The density of ethanol is 789 kg/m3 and gravity g is 9.8 m/s2. How far must the pipe drop in height in order to achieve this pressure? Assume the velocity does not change.
1) A simple pendulum has a length of 0.4m and amplitude of 0.2m. Calculate it's potential energy at it's max height if the Bob has a mass of 400g?
2) The angular velocity of a vibrating loaded spring is 20rads^-1. Calculate urs new angular velocity when the force constant is quadrapled?
3) A circular circus weighing 6MN moves round with a force of 40KN in a merry-go-round. If it covers an area of 36πm^2, calculate the time taken to make 12 complete revolutions?
4)The difference between the range of a projectile and the magnitude of the time of flight doubles the time taken to reach max height. If it's projected at 30° to the horizontal, calculate the time of flight and the max height respectively?
A ball of mass m=8 kg is suspended from a string of length L=5m the ball revovles in constant speed of horizontal circle of radius r=3m calculate the speed
A cylindrical copper rod length 1.50m and radius 2.0cm is insulated to prevent heat loss through its curved surface.one end is attached to a thermal reservoir fixed at 300°C and the other is attached to a thermal reservoir fixed at 30°C.What is the rate at which entropy increases for the rod reservoirs system?
In rising from rest to rest in 8 seconds, a lift accelerates uniformly to its maximum speed and then retards uniformly. The retardation is a third of the acceleration and the distance travelled is 20m. Find the acceleration, retardation and the maximum speed reached
