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2 years ago

Why do the quadrants in coordinate plane go anti-clockwise?.

Engineering

1 answer:

tia_tia [17]2 years ago

7 0

Answer:

Quadrants are counter-clockwise because angles are measured counter-clockwise; and angles are measured counter-clockwise so that Cross Product of unit vector in X direction with that in the Y direction has to be the unit vector in the Z direction (coming towards us from the origin).

Explanation:

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An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and

k0ka [10]

Answer:

A.) 0.3088

B.) 0.0017

C.) part A

Explanation:

A.)

$z1=$ $\frac{\left(150-137\right)}{27.7}$ $=0.4693$

$z2=\frac{\left(201-137\right)}{27.7}=2.3105$

$P(0.4693$

B.)

$z1=\frac{150-137}{27.7/ \sqrt{39}} =2.9309\\z2=\frac{201-137}{27.7/ \sqrt{39}}=14.4289$

$\\P(2.9309$

C.) Since the seat performance for an individual pilot is more important than 39 different pilots.

3 0

3 years ago

Read 2 more answers

A vertical plate is partially submerged in water and has the indicated shape. The height is 3m, the width at the top is 4m, and

natka813 [3]

Answer: 1.98 × 10^4 N

Explanation:

Form similar triangle ADE and ABC

a/x= 2/3, a=2/3x

Width of the strip w= 2(4+a) = 8+2a

W= 8 +2 (2/3x)= 8+4/3x

Area of the strip = w Δx

(8 +4/3x) Δx

Pressure on the strip p= pgx= 10^3 ×9.81x= 9810x

But,

Force= Pressure × area= 9810x × (8+4/3x)Δx

Adding the forces and taking lim n to infinity

F total= lim n--> infinity E 9810x × (8+4/3x)Δx

Ftotal= Integral 2,0 9810x × (8+4/3x)Δx

F total= 9810 integral 2, 0 (8+4/3x)dx

= 9810(8+x^2/2 + 4/3x^3/3)2,0

=9810(4x^2 + 4/9x^3)

=9810(4x2^2 + 4/9×2^3-0)

=9810(16 + 32/9)

Hydrostatic force as an integral

Ft= 19.18 ×10^4N

7 0

2 years ago

Two blocks A and B have a weight of 10 lb and 6 lb , respectively. They are resting on the incline for which the coefficients of

sertanlavr [38]

Answer:

Part A- $10.06^\circ$

Part B- 0.1946ft

Explanation:

Block A

Apply force equilibrium equation along x direction.

$\begin{array}{l}\\\sum {{F_x}} = 0\\\\{F_A} + {F_S} - 10\sin \theta = 0\\\end{array}$

Here, ${F_A$ } is friction force on block A and ${F_S$ }is spring force, and \theta is inclination angle.

By substitution

$0.14\,{N_A} + \left( {1.9x} \right)\,{\rm{lb}} \cdot {\rm{ft}} - 10\sin \theta = 0$

Similarly, apply force equilibrium equation along y direction.

$\begin{array}{l}\\\sum {{F_y}} = 0\\\\{N_A} - 10\cos \theta = 0\\\\{N_A} = 10\cos \theta \\\end{array}$

By substitution

$\begin{array}{l}\\0.14\,\left( {10\cos \theta } \right) + \left( {1.9x} \right) - 10\sin \theta = 0\\\\\left( {1.9x} \right) = 10\sin \theta - 1.4\cos \theta \\\end{array}$

Block B

Apply force equilibrium equation along x direction.

$\begin{array}{l}\\\sum {{F_x}} = 0\\\\{F_B} - {F_S} - 6\sin \theta = 0\\\end{array}$

By substitution

$0.24\,{N_A} - \left( {1.9x} \right) - 6\sin \theta = 0$

Apply force equilibrium equation along y direction.

$\begin{array}{l}\\\sum {{F_y}} = 0\\\\{N_B} - 6\cos \theta = 0\\\\{N_B} = 6\cos \theta \\\end{array}$

$\begin{array}{l}\\0.24\,\left( {6\cos \theta } \right) - \left( {1.9x} \right) - 6\sin \theta = 0\\\\\left( {1.9x} \right) = 1.44\cos \theta - 6\sin \theta \\\end{array}$

Calculate the inclination angle when both blocks begin to slide.

$\begin{array}{l}\\10\sin \theta - 1.4\cos \theta = 1.44\cos \theta - 6\sin \theta \\\\16\sin \theta = 2.84\cos \theta \\\\\tan \theta = \frac{{2.84}}{{16}}\\\\\theta = {\tan ^{ - 1}}\left( {\frac{{2.84}}{{16}}} \right)\\\end{array}$

Calculate the change in length of the spring.

$\begin{array}{l}\\\left( {1.9x} \right) = 1.44\cos \left( {10.06^\circ } \right) - 6\sin \left( {10.06^\circ } \right)\\\\1.9x = 0.3697\\\\x = 0.1946\,{\rm{ft}}\\\end{array}$

3 0

3 years ago

Use a stem and leaf display to organize the following distribution of scores. Use six stems with each stem corresponding to a 10

dangina [55]

Answer:

The complete question is:

Use a stem and leaf display to organize the following distribution of scores. Use six stems with each stem corresponding to a 10-point interval.

Scores: 16, 42, 53, 41, 69

34, 33, 40, 61, 23

53, 49, 55, 29, 10

44, 64, 51, 21, 39

36, 58, 60, 27, 47

14, 44, 38, 31, 56

The answer is:

The decimal point is 1 digit(s) to the right of the |

1 | 046

2 | 1379

3 | 134689

4 | 0124479

5 | 133568

6 | 0149

Explanation:

4 0

3 years ago

Maintain a distance of at least _____ between your vehicle and the vehicle behind you

Serga [27]

Maintain a distance of at least __2___ between your vehicle and the vehicle behind you.

Explanation:

As the car infront passes a stationary object like a lamp post, the driver in the car behind should count at least two- seconds before their car reached and passes the stationary object too. This two-second rule ensures that cars maintain a safe distance between each other to avoid tailgaiting and collisions.

This rule leaves at least some room for the drivers to react swiftly enough, and avoid collisions, in case the car infront holds emergency breaks. It is even recommended that more seconds are used in hazardous conditions such as fog and slippery roads.

Learn More:

For more on two-seconds rule in road safety check out;

brainly.com/question/13084143

brainly.com/question/595072

#LearnWithBrainly

3 0

3 years ago