How does the cross-section of the material affect its resistance? Justify your answer
A one meter section of circular cross-section wire has a resistance of 382 Ohms. If you stretched the wire (while maintaining a circular cross-section), how long would the wire have to be to have a resistance that is 48.8 times as large? Don't round. The answer should be 6.99 but I need steps to understand the answer.
If marginal propensity to consume falls. How does this affect the Keynesian cross model? Then how does it affect the IS Curve?
A wire with a circular cross section and a resistance R is lengthened to 5.24 times its original length by pulling it through a small hole. The total volume of the wire is unchanged. Find the resistance of the wire after it is stretched. Answer in units of R.
3. The electric resistance of a wire having length, cross section d and resistivity ? is R : When the wire is stressed long t man. each of the three quantities that affect R changes and therefore R undergoes a change. Please derive the expression fordR/R in relation to the strain ? . (25)-
How does initial speed, angle, height, Gravity, and air resistance affect the time, range, and max height of a projectile?
5) Propose a cross-section (with dimensions) of a bar that has the same length, material, and cross-section area (as a number not shape) as the provided bar, with double the applied load (Torque), but has lower stress value than what you got. Using the equations given in the handout and lecture notes, you are asked to come up with a different cross-section shape that has the same length, material, and cross-section area (e.g. if the one you have is 10...
(5) The cross-section of a tunnel is a rectangle of height h surmounted by a semicircular roof section of radius r. If the cross-sectional area is A, determine the dimensions of the cross-section which minimize the perimeter when A= 8m2. Make sure to (a) Round your answer to two decimal places. (b) Justify that your values produce a global minimum. (c) Answer the specific question asked.
The resistance R can be calculated using the formula below Cross Section Area Length Resistivity, typical value for copper 1,68 x 10-8 Ohm 02/02/2019 42 Exercise 01: Resistivity Calculation Exercise Find the resistance of a hollow cylindrical pipe of length 1m whose inner and outer radii are 0.1m and 0.2m respectively Assume that the cylindrical pipe is made of a material of resistivity 2 x 10-8ohm m
4. Do resistance and resistivity depend on: - the wire length? - the wire cross-section? - the wire shape?
The resistance R of a wire of length l and uniform area of cross-section A is given by R = rhol/A, where rho is the resistivity of the wire. You melt the wire and recast it to have a new length l' = 10l (keeping the volume V = Al of the wire constant). What is the new resistance of the wire, if the original resistance of the wire was 100.0 Ohm.