Along, square, electrical heating element standing on a corner with one side of the square heating...

Along, square, electrical heating element standing on a corner with one side of the square heating element being 25mm, thermal conductivity k = 240 W/m ? K, density ñ = 2700 kg/m3, and specific heat cp = 900 J/kg ? K is installed in a duct for which air moves in cross flow over the heater at a temperature and velocity of 30°C and 10 m/s, respectively.

(a) Neglecting radiation, estimate the steady-state surface temperature when, per unit length of the heater, electrical energy is being dissipated at a rate of 1000 W/m. ?

(b) If the heater is activated from an initial temperature of 30°C, estimate the time required for the surface temperature to come within 20°C of its steady-state value. ?

Expert Solution

samet mamat answered 3 years ago

Given a square of side a, lying in the x-y plane, with one corner at the...

Given a square of side a, lying in the x-y plane, with one corner at the origin and the two adjacent sides aligned with the x and y axis, respectively. Three of the corners of the square are occupied by fixed charges: two equal positive charges Q each at (a,0) and (0.a), and a negative charge -q at (a,a). There is NO charge at the origin (0.0). We want to find and discuss the NET electric field AT THE ORIGIN...

Calculate the magnitude of the electric field at one corner of a square 2.42 mm on...

Calculate the magnitude of the electric field at one corner of a square 2.42 mm on a side if the other three corners are occupied by 2.25×10−6 C charges.

13. When a single charge q is placed on one corner of a square, the electric...

13. When a single charge q is placed on one corner of a square, the electric field at the center of the square is F/q. If three other equal charges are placed on the other corners, the electric field at the center of the square due to these four equal charges is A) F/(2q). B) F/(4q). C) 4F/q. D) F/q. E) None of the choices are correct. 14. Lightning (a flow of electrons between the ground and a thundercloud) lasts...

1.Calculate the magnitude of the electric field at one corner of a square 1.43 m on...

1.Calculate the magnitude of the electric field at one corner of a square 1.43 m on a side if the other three corners are occupied by 2.80E-6 C charges 2.Three positive particles of charges Q = 74.1 μC are located at the corners of an equilateral triangle of side L = 15.7 cm, as seen in the figure below. Calculate the magnitude of the net force on each particle. 3.An electron (mass m = 9.11E-31 kg) is accelerated in the...

A long, cylindrical, electrical heating element of diameter D= 10 mm, thermal conductivity k= 240 W/m·K,...

A long, cylindrical, electrical heating element of diameter D= 10 mm, thermal conductivity k= 240 W/m·K, density ρ= 2700 kg/m3, and specific heat cp= 900 J/kg·K is installed in a duct for which air moves in cross flow over the heater at a temperature and velocity of 27°C and 15 m/s, respectively. (a) Neglecting radiation, estimate the steady-state surface temperature when, per unit length of the heater, electrical energy is being dissipated at a rate of 1500 W/m. (b) If...

Part 1- The Heating Division of Swifty International produces a heating element that it sells to...

Part 1- The Heating Division of Swifty International produces a heating element that it sells to its customers for $45 per unit. Its variable cost per unit is $22, and its fixed cost per unit is $11. Top management of Swifty International would like the Heating Division to transfer 15,200 heating units to another division within the company at a price of $34. Assume that the Heating Division has sufficient excess capacity to provide the 15,200 heating units to the...

A square with side lengths 5 centimeters is positioned with one apex at the center of

A square with side lengths 5 centimetres is positioned with one apex at the centre of a second square (which has side lengths of 4 centimetres). The longest side of the overlapping (shaded) quadrilateral region has a length of 3 centimetres. Calculate the area of the shaded region. Show your full working-out together with an appropriately labelled sketch.

Right Triangle:If the square of one side equals the sum of the squares of the other...

Right Triangle:If the square of one side equals the sum of the squares of the other two sides. in python

Q-2) In a right triangle, the square of the length of one side is equal to...

Q-2) In a right triangle, the square of the length of one side is equal to the sum of squares of the lengths of the other two sides. Write a program that prompts the user to enter the lengths of three sides of a triangle and then outputs a message indicating whether the triangle is a right triangle or not.

Under basic electrical engineering, discuss and make summary on electrical lighting and heating requirements. The report...

Under basic electrical engineering, discuss and make summary on electrical lighting and heating requirements. The report should be A4 size.

Question