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### Water is pumped as a compressed liquid into a steam boiler at a rate of 100 kg/min.?

Water is pumped as a compressed liquid into a steam boiler at a rate of 100 kg/min. The boiler produces superheated steam leaving the boiler at the same mass flow rate. The exiting steam has 26.7 deg Celsius above saturated vapor. The process is a constant pressure process. the steam exits the boiler at 1.5 MPa. The feed water is pumped into the boiler at 80 deg Celsius. What is the total energy per kg added to the steam from entering water in KJ/kg

Engineering5 years ago### Determine the reactions at the supports?

Determine the reactions at the supports

Trying to understand simple distributed loading.

1 AnswerEngineering7 years ago### A point charge q1 = -4.00 nC is at the point x = 0.60 m, y = 0.80 m , and a second point charge q2 = +6.00 nC?

A point charge q1 = -4.00 nC is at the point x = 0.60 m, y = 0.80 m , and a second point charge q2 = +6.00 nC is at the point x = 0.60 m , y = 0.

Calculate the magnitude of the net electric field at the origin due to these two point charges. how do i find the angle (with tan).

Calculate the direction of the net electric field at the origin due to these two point charges.

1 AnswerPhysics7 years ago### A product total manufacturing costs typically constitute what proportion of the product's selling price?

1. 10%

2. 80%

3. 60%

4. 40%

Isnt it 80% because of the different manufacturing processes?

1 AnswerCorporations7 years ago### Multi-variable Calc question Use cylindrical coordinates to evaluate the triple integral?

Use cylindrical coordinates to evaluate the triple integral sqrt(x^(2)+y^(2)) dV , where E is the solid bounded by the circular paraboloid z = 16-4(x^(2)+y^(2) and the xy - plane.

1 AnswerMathematics7 years ago### Multi-variable calc question Use spherical coordinates to evaluate the triple integral?

Use spherical coordinates to evaluate the triple integral x^(2)+y^(2)+z^(2) dV, where E is the ball: x^(2)+y^(2)+z^(2) <= 100

2 AnswersMathematics7 years ago### What are the cylindrical coordinates of the point whose rectangular coordinates are (x=5, y=3, z= 3)?

r = ?

Theta = ?

z = 3

1 AnswerMathematics7 years ago### Let D be the region in the first quadrant of the plane inside the limaçon r =7+5cos(theta) Find the volume?

Let D be the region in the first quadrant of the plane inside the limaçon r = 7+5cos(theta) Find the volume of the solid with base D that lies under the surface z = r^(1)sin(theta)

1 AnswerMathematics7 years ago### Using polar coordinates, evaluate the integral which gives the area which lies in the first quadrant between?

Using polar coordinates, evaluate the integral which gives the area which lies in the first quadrant between the circles x^2+y^2=196 and x^2-14x+y^2=0

1 AnswerMathematics7 years ago### What are the rectangular coordinates of the point whose cylindrical coordinates are?

What are the rectangular coordinates of the point whose cylindrical coordinates are

(r= 5, theta = (2pi)/3, z= -5) ?

x=?

y=?

z=?

1 AnswerMathematics7 years ago### Using polar coordinates, evaluate the double integral of sin (x^2+y^2) dA where R is t?

Using polar coordinates, evaluate the double integral of (x^2+y^2)dA where R is the region 4<=x^2 + y^2<=36

1 AnswerMathematics7 years ago### Evaluate the integral by reversing the order of integration?

S denotes integral sign

S from 0 to 1 * S from 6y to 6 * e^(x^2)dxdy

2 AnswersMathematics7 years ago### A plate occupies the rectangle (0,4)X(0,3), and the density of the plate at (x,y) is equal to 8+x-y?

A plate occupies the rectangle [0,4]X[0,3], and the density of the plate at (x,y) is equal to 8+x-y

1. What is the total mass?

2. What are the moments about the y-axis and x-axis?

3. Where is the center of mass?

1 AnswerMathematics7 years ago### What are the spherical coordinates of the point whose rectangular coordinates are (1,5,-3)?

pho = sqrt(35)

theta = arctan(5)

psi = ?

(sqrt(35),arctan(5). ?)

I can't find the last value.

1 AnswerMathematics7 years ago### A cylindrical drill with radius 1 is used to bore a hole throught the center of a sphere of radius 6.?

A cylindrical drill with radius 1 is used to bore a hole throught the center of a sphere of radius 6. Find the volume of the ring shaped solid that remains.

1 AnswerMathematics7 years ago### Let D be the region in the x,y-plane enclosed by the curves?

Let D be the region in the x,y-plane enclosed by the curves x = y^2-8 and x = 2y-5. Find the volume of the solid with base D that lies under the surface z = 2y^2.

Not sure on how to set up this problem.

2 AnswersMathematics7 years ago### Use Lagrange multipliers to find the maximum and minimum values of f(x,y) = xy on the ellipse 8x^2+y^2=2?

Can anyone help me do this problem step by step?

1 AnswerMathematics7 years ago### Use Lagrange multipliers to find the maximum and minimum values of?

Use Lagrange multipliers to find the maximum and minimum values of f(x, y, z) = 3x + 3y + 5z on the sphere x^2 + y^2 + z^2 = 1.

1 AnswerMathematics7 years ago### Use Lagrange multipliers to find the maximum and minimum values of?

Use Lagrange multipliers to find the maximum and minimum values of f(x, y) = 4x + y on the ellipse x^2 + 4y^2 = 1

1 AnswerMathematics7 years ago### If R is the total resistance of two resistors connected in parallel with resistances R_1 and R_2, then?

If R is the total resistance of two resistors connected in parallel with resistances R_1 and R_2, then R = (R_1*R_2)/(R_1+R_2). If R_1 is measured to be 17 ohms with a possible percentage error of 3 percent while R_2 is measured to be 33 ohms with a possible percentage error of 5 percent, use differentials to estimate the maximum percentage error in the calculation of R.

I cant seem to calculate R

2 AnswersMathematics7 years ago