A ball of mass 1 kg collides perpendicularly on a smooth stationary wedge of mass 2 kg kept on a smooth horizontal surface. The coefficient of restitution is e (= 1/2). The velocity of ball after the collision is m/s. The value of K is

An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J).  It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).

A solid circular shaft has a diameter of d mm and is made from steel, which fail when tested in simple tension test at a stress of 150 MPa. The shaft was subjected by bending moment and torque which are 22.2 kNm and 44.4 kNm respectively. Calculate the minimum allowable shaft diameter, d according to:- (a) Tresca failure criterion  (b) Von Mises theory of elastic failure

I need a clear answer by hand, not by keyboard  and fast answer within 20 minutes. Thank you | dybala

1. The development of thermodynamics since the 17th century, which was pioneered by the invention of the steam engine in England, and was followed by thermodynamic scientists such as Willian Rankine, Rudolph Clausius, and Lord Kelvin in the 19th century. explain what the findings or theories of the 3 inventors are! Please answer fast max 25-30.minutes thank u

Hello, please help me. Thank you.   Lessons we discussed: Dynamics of Rigid Bodies, Erratic Motion, Rectilinear Motion, Curvilinear Motion, Motion of a Projectile: Normal and Tangential Components.   Reminders for you: Kindly show the complete step-by-step solution. Please make sure that your handwriting is understandable and the picture of the solution is clear. I will rate you with “like/upvote” after. I need the answer right away, thank you.   Given Problem: Please see the attached photo.

Ok. how do I then find the matrix for the element, (stiffness matrix), i only need for the BC element.  Something like the picture. I don't understand how to find it with the angle of the element.