248 Answered Questions for the topic mechanical engineering

7h

#### check if the differential equation x^2 * y’ = x* y + y^2 is:

check if the differential equation x^2 * y’ = x* y + y^2 is:a) linearb) separable c) Exact

7h

#### check if the differential equation x^2 * y’ = x* y + y^2 is:

check if the differential equation x^2 * y’ = x* y + y^2 is:a) linearb) separablec) Exact

9h

#### Is differential equation x^2 * y’ = x* y + y^2 a) linear b) separable c) Exact

Is differential equation x^2 * y’ = x* y + y^2 a) linearb) separable c) Exact

7d

#### Is this diffrential equation linear or non-liner?

1.) y'' + (2/x)*y' + 3 = x^32.) x*y^3 + x^3 *y' - 33.) sin(x)*y^(4) - (1/x)*y^(2) = cos(x)4.) y'' + 2x* (y')^5 = e^4x

20d

#### design a feedback controller

A mass-spring-damper system is shown. The input is a force, u, acting on the mass block. The output is displacement, y, of the mass block. Using the well-known Newton’s second law, the dynamic...
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#### particle on a ring, quantum mechanics

A)Explain the reason why Ψ(x) = Acos(πx/L) is not able to describe a particle of mass m in a ring of length L. B) On the other hand, explain why Ψ(x) = Acos^2(πx/L) is.C) When momentum is...
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#### A train travels along a track and its speed (mph) is given s(t)=29t for the first half hour. Its speed is constant and equal to s(t)=29/2 after the first half hour. t is in hours.

How far (miles) does the train travel in the first hour?

04/12/23

#### Industrial Engineering and Operation Research -- regular points, linearly independence

1. Find all regular points of the set {x ∈ R^4 | 2(x1 +x2 +x3)^3 + 3(x1 +x2 +x3)^2 = 1, x1^2 +x2^2 +x3^2 +x4 = 1}.(( Just help me to look at the gradient of both constraints and determine if it is...
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Mechanical Engineering Electrical Engineering

04/10/23

#### How to underwater weld alone?

What inventions need to be made to make this possible? I own a deep water snorkel, and i have welding experience. Seems like no one has achieved this.

#### crystal lattice of a material

What is the crystal lattice of a material having the CFC crystal structure with a unit cell consisting of copper (Cu) and silver (Ag) atoms?how the choice of atoms that make up the crystalline...
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#### I have a boundary-value problem that need to be solved using laplace transform

∂^2u/∂x^2 = ∂^2u/∂t^2 + 2∂u/∂t + u , x>0 , t>0u(0,t) = sin 3t, t>0u(x,0)=0, ∂u/∂t |t=0 =0, x>0The answer is: u(x,t) = e^-x sin 3(t-x)u(t-x)

#### How can I increase the packing factor and at the same time create more void space in a crystalline structure of a refractory material?

How can I optimize the packing factor and at the same time create more void space in a crystalline structure of a refractory material?

03/26/23

#### Help-Calculate the conductivity of insulating material.

Example 3.38. An electric cable of 12 mm diameter is insulated to increase the current capacity. Due to insulation the current carrying capacity is increased by 15% without increasing cable surface...
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Mechanical Engineering Physics

03/06/23

#### Torque and Friction

An 85 kg man is two-thirds the way up a an 8 m ladder that rests against a smooth wall (smooth means no friction) and has a mass of 25 kg and makes an angle with the ground of 50°. Find the force...
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03/05/23

#### How do I arrive at the wave function of a particle in a ring? Why would the answer be ψ = Ae^+-inθ and not one with sine or cosine?

How do I get to the particle wave function? . Consider a particle in a ring. For this example let the circumference line to extend from -L/2 to L2 with the end points glued together to form a...
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03/05/23

#### the ends x = ±L/2 are to be glued to form the circle.

We take the interval of length L to be in the range-L/2 < x < L/2The ends x = ±L/2 are to be glued to form the circle.-normalize Ψ-what is the probability that the particle in the ring has...
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03/04/23

#### help, Determine The de Broglie wavelength of an accelerating proton in the Large Hadron Collider

a) Determine The de Broglie wavelength of an accelerating proton in the Large Hadron Collider, where the proton has an energy of 3.5 TeV.b) using the following E2 = p2c2+m2c4 first, explain why...
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Mechanical Engineering Physics

03/02/23

#### Piston P has a velocity upwards of 68.95 mm/s. Find the angular velocity of arms AB and BD when q=67deg..

https://imgur.com/a/yADcvhq

Mechanical Engineering Physics

02/13/23

#### (a) What is the radius of said orbit? (b) What parameters are conserved throughout the orbit? Calculate one of them

A satellite is inserted into a circular Earth orbit with period = 8 hours. Answer to part a) r = 20,307 kmAnswer to part b) specific energy = -9.8142 km^2/s^2 & specific angular momentum = 89,...
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#### Einstein Convention for Summations and Related Operations

Could someone please explain how the step marked in blue colour in image number 2(which can be found via:...
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Mechanical Engineering

12/25/22

#### Can low water pressure from the city cause a water heater not to work?

Can low water pressure from the city cause a water heater not to work? Problem started Just since last night when the city starting having issues with the water pressure in the cold weather.

12/08/22

#### Ferro Corporation, that manufactures high quality enamel products is considering investing $100,000 in two new enamels identified as X and Y...

1. Ferro Corporation, that manufactures high quality enamel products is considering investing $100,000 in two new enamels identified as X and Y. The investment in X is $20,000 and is expected...
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12/08/22

#### The overall rate of return on $250,000 investment that returns 25% on the first $100,000 and 15% on the remaining $150,000 is closest to?

1. The overall rate of return on $250,000 investment that returns 25% on the first $100,000 and 15% on the remaining $150,000 is closest to?(a) 22% (b)...
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