Mechanical Engineering Answers

A circular rod of diameter "d" is 25(mm) and length "L" 2(m) to be stretched outward, with a force "F" of 79(N), The stress(KPa)generated will be

Consider arterial blood viscosity µ = .0 025 poise. If the length of the artery is 1.5cm, radius 8*10^(-3) cm

P = P− P = 4×10^3dynes/cm^2 then find (i) maximum peak velocity of

blood and (ii) the shear stress at the wall.

using the equipartition of energy concept estimate the ideal gas Cp(not Cv) in units KB for the low temperature regime where no vibrational modes are activated(if you calculate Cp=42KB, enter 42 as your answer )

A mechanical speed control system works on the basis of centrifugal force, which is related to angular velocity through the formula. F = mrω2 The following values are measured to determine ω: r = 20 ± 0.02 mm, m = 100 ± 0.5 g, and F = 500 ± 0.1% N. Find the rotational speed in rpm and its uncertainty.

A mechanical speed control system works on the basis of centrifugal force, which is related to angular velocity through the formula F = mrw2. The following values are measured to determine ω: r = 25 ± 0.02 mm. m = 120 ± 0.5 g. and F = 600 ± 0.2% N. Find the rotational speed in rpm and its uncertainty. All measured values have a confidence level of 95%

Two systems have the following equations of state and are contained in a closed cylinder, separated by a fixed, adiabatic and impermeable piston. N1=2, N2=1.5

. The initial temperatures are T1 = 175 K and T2 = 400 K. The total volume is 0.025 m^3

. The piston is allowed to move and heat transfer is allowed across the piston. Determine the final temperature of the system (in Kelvin).

1/T1=3/2(R*N1/U1) , P1/T1=R*N1/V1

1/T2=5/2(R*N2/U2) , P2/T2=R*N2/V2

Calculate the value of the translational partition function of O2 at 1000 K for a volume of 1 m3. Submit your answer multiplied by 10−32 (i.e. if you calculate 4.2e33, input 42).

A rotor is driven by a co-axial motor through a single plate clutch,both sides of the plate being effective.The external and internal diameters of the plate are respectively 220 mm and 160 mm and the total spring load pressing the plates together is 570 N.The motor armature and shaft has mass of 800 kg with an effective radius of gyration of 200 mm.The rotor has a mass of 1300 kg with an effective radius of gyration of 180 mm.The co-efficient of friction for the clutch is 0.35.The driving motor is brought up to a speed of 1250 r.p.m. when the current is switched off and the clutch suddenly engaged. 1.The final speed of the motor and rotor is....... QUESTION 2.The time to reach this speed is .....QUESTION 3.The kinetic energy lost during the period of slipping is

A rotor is driven by a co-axial motor through a single plate clutch,both sides of the plate being effective.The external and internal diameters of the plate are respectively 220 mm and 160 mm and the total spring load pressing the plates together is 570 N.The motor armature and shaft has mass of 800 kg with an effective radius of gyration of 200 mm.The rotor has a mass of 1300 kg with an effective radius of gyration of 180 mm.The co-efficient of friction for the clutch is 0.35.The driving motor is brought up to a speed of 1250 r.p.m. when the current is switched off and the clutch suddenly engaged.QUESTION 1.The final speed of the motor and rotor

An accelerometer is measuring a structure as described below: Damping ratio of accelerometer = 0.65 Highest frequency measured by the accelerometer = 6000 hz Natural frequency of the accelerometer = 18000 hz What is the percentage error in the accelerometer at the highest frequency it can measure? (Type in a two-decimal number that represents a percentage)