Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A prototype disk brake for a bicycle was designed and consists of a pair of pads (area 5 cm x 1 cm) pressed against opposing faces of the steel disk. The pads are aligned with the longer dimension tangent to the direction of rotation and centers of the pad are at a distance of 10 cm from the center of the disk. To validate the durability of their design the students will test the brake on a rotating machine to simulate in-service wear. The disk rotates at a constant speed and the brakes are applied for 10 seconds every minutes, with each pad applying a normal load of 1 kN.
Determine the rotation speed (in RPM) if the test is to simulate braking a bicycle traveling at a speed of 20 km/hour. The wheel diameter (including the tire) is 70 cm. When the brakes are applied, the machine records a torque increase of 30 Nm. Find the friction force that is being applied to each pad and estimate the friction coefficient. Estimate the thickness of material removed per hour of testing, if the Archard wear constant for the materials is ka = 2x10^-8 MPa^-1. If the pads are 3 mm thick how long will they last before thye are completely worn off? What other factors influence the wear ratein service?
If 300 Kg of air is pumped into a previously empty 100 m^3 tank, and the temperature of the air in the tank is 25 deg C, then what is the pressure in the tank in N/m^2?
a sealed rigid container of volume .6 m3 contains water in the form of saturated vapor at 550 kpa. energy in the form
a bar of negligible mass fixed with a tip mass forms part of a machine used to punch holes in a sheet of metal as it
an ideal gas of mass 2 kg is contained within a rigid cylinder and undergoes a cycle which consists of three separate
a 0.75 m3 tank contains nitrogen at 150kpa and 40degc. 2.0 kg of oxygen are added to the tank. what is the final
steam in a counter flow condenser of a steam power plant is to be condensed at a temperature of 30c with cooling water
the surface pressure of venus is about 90 bar and the surface temperature is ap-proximately 880 degrees f. the
water vapor at 6 mpa 600?c enters an adiabatic turbine operating at steady state and expands to 10 kpa. the mass flow
an adiabatic compressor compresses air from atmospheric pressure and 70 degf at a rate of 10000 acfm actual cubic feet
water at inlet 1 to a heat exchanger enters the heat exchanger through a circular pipe at a temperature of 200 oc a
saturated water vapor at 350c is heated at a constant pressure until its volume has doubled. determine the final
in a laboratory steam is condensed at atmospheric pressure i.e. 212degf on the shell-side of a vertically-oriented
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd