Estimate the yielding stress of your blutack

Assignment Help Mechanical Engineering

Reference no: EM13718504

1. Convert Equation 2 to an expression in terms of rpm instead of rad/s. Rearrange the equation to give the maximum rpm that can be applied without failure for a material with yield stress s_y.

2. Estimate the yielding stress of your blu-tack using a circular cross-section sample and weights/scales. Report three measurements.

3. Assume the density of blu-tack is ~2500 kg/m³ (check this if you have time) and use your equation to estimate the maximum rpm we can expect for a disk of radius R=_____________ mm.

4. Roll out a sheet of blu-tack, punch out a disk with your specified radius, assemble a flywheel for testing on an electric drill and determine the approximate critical rotation speed in rpm. Comment on the outcome.

5. Derive the material index for a light flywheel that stores the most energy per unit mass and that does not yield when spinning. The rotation speed (angular velocity) and geometry do not matter. Identify the constraint, the objective and the free variables. (Hint: establish the energy per unit mass, then eliminate the free variables). Use the relevant chart or the CES software to establish an optimal material - provide a few sentences of explanation.

6. Ignoring the chance of failure and the weight, derive a material index for a flywheel that stores the most energy per unit volume. Use the relevant chart or the CES software to establish an optimal material - provide a few sentences of explanation.

Reference no: EM13718504

Questions Cloud

Carbon dioxide dissolves in water and water evaporates : Carbon dioxide dissolves in water and water evaporates into the atmosphere during the experiment how to D two factors affect the results of your analysis in this experiment. When an experiment is done by putting an alka seller tablet in water comb..

The accursed house satirize the human flaws : What and how does the story "The Accursed House satirize the human flaws - how does the story relate in your day to day life?

Calculate the concentration of your stock solution in ppm : A stock solution of capsaicin in HPLC grade ethanol is provided. 65% capsaicin 35% dihydrocapsaicin. Calculate the concentration of your stock solution in ppm. The density of methanol = .791g/mL.

Define the diagnosis and treatment of thyroid disease : Two radioactive isotopes of iodine used for the diagnosis and treatment of thyroid disease have mass numbers of 123 and 131. For each isotope, give the following information: (a) the number of protons; (b) the number of neutrons; (c) the number of..

Estimate the yielding stress of your blutack : Estimate the yielding stress of your blutack using a circular cross-section sample and weights/scales. Report three measurements.

Find the concentrations of the acetate : A 50 mL volume of the solution with an initial pH of 6.5 was titrated with 0.01 M HCl and after the addition of 9.8 mL of titrant, the solution pH was 4.8. Find the concentrations of the acetate and phosphate species that were present in the initi..

Michaelis-constant of an enzyme in a catalyzed reaction : The michaelis-constant of an enzyme in a catalyzed reaction is 10 microM. What is the substrate concentration in microM at which the reaction rate is 10% of Vmax.

Write the equation for the reaction to reach the end point : A 20.00 mL sample of the standard KHP (KHC8H4O4) solution requires 24.16 mL of your base to reach the end point. Write the equation for the reaction.

Design a small engine for a lawn mower : Design a small engine for a lawn mower. You will need to investigate the typical lawn mower engine size in the market and develop a competing design.

User Account

All Pages