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4 years ago

C) Three AC voltages are as follows:

Engineering

1 answer:

stich3 [128]4 years ago

4 0

Answer:

What is the probability of selecting the 4 of spade or black diamond from a deck of 52 playing cards?

a) 2/52

b) 4/52

c) 3/52

d) 1/5

Explanation:

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Instruments in airplane A indicate that with respect to the air the plane is headed 30◦ north of east with an airspeed of 300 mi

mamaluj [8]

Answer:

velocity of the plane = 274 miles/hour at 30.9⁰

velocity and direction of the wind = 26.7 miles/hour at 20.8⁰

Explanation:

Let the velocities be resolved using the vector method.

Let the x - axis be directed to the east

similarly, we shall direct the y axis upwards- to the north

Airspeed is given by

300 mil/h. (30⁰) = 300 (cos30⁰i + sin 30⁰j

plane relative to ship

= 12 miles/hour

= 12j

velocity of the plane is given by:

v = $A_{p}$ + Vijb

= -12 j + 280 (cos 33⁰i + sin 33⁰j)

= 234.83 i + 140.50 j

$V_{a}$ = 274 miles per hour

velocity of the wind is given by the following equation:

$v_{w} = +WIA= A-$

= 234.831 + 140.50J - 300(cos 30⁰i + sin 30⁰j)

= -24.98i - 9.50 j

= 26.7 miles per hour at 20.8⁰

4 0

3 years ago

Drivers must be careful when driving close to cyclists and should keep at least ___ feet apart when passing cyclists on the road

faust18 [17]

Answer:

at least 8 feet

Explanation:

4 0

2 years ago

Consider a fluid with mean inlet temperature Ti flowing through a tube of diameter D and length L, at a mass flow rate m'. The t

EleoNora [17]

Answer:

$T_m(x) = T_i+\frac{\pi D}{\dot{m}c_p}(ax+\frac{bL}{\pi}-\frac{bL}{\pi}cos(\frac{x\pi}{L}))$

Explanation:

Our data given are:

$T_i =$ Mean temperature (inlet)

D = Diameter

L = Length

$\dot{m}=$ Mass flow rate

Equation to surface flow as,

$q(x) = a+bsin(x\pi/L)$

We need to consider the perimeter of tube (p) to apply the steady flow energy balance to a tube , that is

$q(x)pdx=\dot{m}c_p dT_m$

Where $p=\pi D$

Re-arrange for $dT_m,$

$dT_m = \frac{q(x)pdx}{\dot{m}c_p}$

Integrating from 0 to x (the distance intelt of pipe) we have,

$\int\limit^{T_m(x)}_T_i dT_m = \frac{p}{mc_p}\int_0^x q(x)dx$

Replacing the value of q(x)

$\int\limit^{T_m(x)}_T_i dT_m = \frac{p}{mc_p}\int_0^x (a+bsin(x\pi/L))dx$

$T_m(x)-T_i = \frac{\pi D}{\dot{m}c_p}\int_0^x(a+bsin(x\pi/L))dx$

$T_m(x)-T_i = \frac{\pi D}{\dot{m}c_p}(ax-\frac{bL}{\pi}cos(\frac{x\pi}{L}))^x_0$

$T_m(x) = T_i+\frac{\pi D}{\dot{m}c_p}(ax+\frac{bL}{\pi}-\frac{bL}{\pi}cos(\frac{x\pi}{L}))$

8 0

3 years ago

A vineyard owner is planting several new rows of grapevines, and needs to know how many grapevines to plant in each row. She has

boyakko [2]

Answer:

Finally, display the number of grapevines that will fit in the row

Explanation:

A vineyard owner is planting several new rows of grapevines, and needs to know how many grapevines to plant in each row. She has determined that after measuring the length of a future row, she can use the following formula to calculate the number of vines that will fit in the row, along with the trellis end-post assemblies that will need to be constructed at each end of the row:

V=R-2E/S

The terms in the formula are:

V is the number of grapevines that will fit in the row.

R is the length of the row, in feet.

E is the amount of space, in feet, used by an end-post assembly.

S is the space between vines, in feet.

Write a program that makes the calculation for the vineyard owner. The program should ask the user to input the following：

• The length of the row, in feet

• The amount of space used by an end-post assembly, in feet

• The amount of space between the vines, in feet

Once the input data has been entered, the program should calculate and display the number of grapevines that will fit in the row.

• Declare the variables amountSpace, vinesSpace, and grapevines of double type.

• Prompt and read the length of the row, in feet, the amount of space, in feet, and the space between vines, in feet.

• Calculate the number of grapevines that will fit in the row using the below formula:

grapvines=(rowLength-2*amountSpace)/vinesSpace;

• Finally, display the number of grapevines that will fit in the row.

8 0

3 years ago

________ is not within other loop.Immersive Reader

djyliett [7]

Answer:

I think node

Explanation:

thank you

have a great day

8 0

3 years ago