# Question- LO4: Examine how differential and integral calculus can be used to solve engineering problems. a- If two resistors with resistances R1 and R2 are connected in parallel as shown in the figure below, their electrical behaviour is equivalent to a re…

LO4: Examine how differential and integral calculus can be used to solve engineering problems. a If two resistors with resistances R1 and R2 are connected in parallel as shown in the figure below, their electrical behaviour is equivalent to a resistor of resistance R such that $= 2 + 2. If R1 changes with time at a rate r= “= and R2 is constant, express the rate of change Sof the resistance of R in terms of = R1 andR2. If an object with a speed v giving by the equation v(t) =1+4t+3¢? where tis the time taken to move per minute, what is the travelled distance during the third minute? Aire of mild steel has a radius of 0.5 mm and a length of 3 m. If the young modulus Y = 2.1.x 10" N/m? and the wire is stretched by a force of 40 N determine: 1- The longitudinal stress 2- The longitudinal strain 3- The elongation

1- The longitudinal stress 2- The longitudinal strain 3- The elongation e If the switch ‘Sis at position ‘1’ sufficiently long enough before it is moved to position ‘2’ and after this it is kept in position 2 as shown in the figure below determine: + Values of the instantaneous inductor voltage v, and the instantaneous current through the inductor i, 2 Values of the inductor voltage v, and the current through the inductor i, just after the switch changes 3 The rate of change of i, at t=0 10a TC » e If the equation y = x3— 6 x? + 9x Find the stationary points of the curve and determine whether these points are maxima or minima and prove this.

# Our happy customers

They are fast in responding to homework questions. they have the best technical writers. Thanks for helping me with my programming doubts.

I contact to disklib for homework, they help me out, despite there was some technical issue they gone through extra mile for me and provide me good quality work in first priority. 100% recommended.

Desklib's study resources are best & unique. Their study database is easy to access and easy to use.

100 % recommended.