44 Answered Questions for the topic Engineering

11d

#### Chemical engineering project

What are some household items that can be used to create plastic polymers? I have this project for school that assigns me to create a polymer made from a chemical reaction but I'm stuck on ideas...
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11/21/19

#### circular motion question

A 67 gram coin sits on a horizontally rotating turntable. The turntable makes 1.7 revolution each second. The coin is located 10 cm from the axis of rotation of the turntable. The coin will slide...
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09/27/19

#### Coefficient of Static Friction Physics Problem

A box that weighs 50 N is pulled by a force of 10 N. The coefficient of static friction between the box and the ground is 0.5. Describe what will happen to the box? Will it start moving? Will it...
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09/27/19

#### Moving Elevator Physics Problem

An elevator is suspended by a cable and the elevator weighs 5500 N. The elevator moves upward with an acceleration of 4 m/s2. Find the tension in the supporting cable. * Use 10 m/s2 for the...
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06/23/19

#### In what year did Charles Proteus Steinmetz fix Ford's Generator for the famed $10,000 invoice?

[Charles Proteus Steinmetz](https://en.wikipedia.org/wiki/Charles_Proteus_Steinmetz) is the protagonist of an interesting tale [about fixing a generator at Ford's...
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05/04/19

#### Can i study m.sc in aeronotics after b.sc in Physics?

Currently I am studying b.sc in physics which doesn't include any course over aeronotics or aeronotical engineering but iam very much egar to study aeronotics,so i want to study aeronotics in...
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09/19/18

#### what's the ratio 15 feet to 1.46 inches

It's for measuring a floor plan print that is dimensioned in inches and plotted out on a F-size paper.
when I measure a roll-up door on the floor plan, it measures 1.46 inches even the the...
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03/24/18

#### you are given a motor operated by a 9V battery....

For all the questions below, you are given a motor operated by a 9V battery. The stall torque for this motor is Ts = 0.04 N-m, and its no-load speed, wnl = 2200 rpm. 1. Draw the torque vs. speed...
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01/03/18

#### When should you use Gauss-Jordan method to find inverse? Does the determinant only tell you whether there is an inverse?

Mathematical engineering. I don't understand lol.

11/01/17

#### Is there such thing as a one way valve that can move pressurised air from one cylinder to another?

I just need the name of the part if it exists or a link would be appreciated

08/17/17

#### How long will it take to empy the retention pond?

Three pumps are used to empty retention Pond holding an unknown amount of water. If pump 1 can empty the pond in 4 days, pump 2 can empty the pond in 10 days, and Pump 3 can empty the pond and 5...
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07/21/17

#### Solve chemical reaction for temperature of exothermic reaction (thermite)

Hi there, I I have a question about Physics/ chemistry.If I have a bag of iron oxide(lll) and powdered aluminium in the ratio of 3:1 totalling 72g, with 54g being Fe2O3 and 18g of 2Al, what would...
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03/08/17

#### Maths problem

the resistace R of a wire is directly proportional to its length. If R=40mohms for a wire 10 cm long , find the resistance R in mohms :
a) when the length decreases to 6cm
b) when the length...
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02/04/17

#### Maths problems

the solar energy falling on one square centimeter of the earth is 1.93 calories per minute.if 1 kW = 239 calories per second , how many kilowatts per square meter fall on the earth?round answer to...
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02/04/17

#### solve the problem

the resisitance of a no.8 copper wire whose cross section is 8.37mm^2 is 2.06 ohms per kilometer.a. what is the resistance in ohms per 1000 ft?b. what is the cross section in square inches?

09/25/16

#### 518m long steel arch. how much will it's length change between temperature extremes of -20 degrees Celsius and 35 degrees Celsius

the new river gorge in west virginia is a 518m long steel arch. how much will it's length change between temperature extremes of -20 degrees Celsius and 35 degrees Celsius

09/02/16

#### The example how you get the answer

What is the weight of the plain carbon steel used in the construction of a cylinder that has a radius of 5" and a height of 24" assume 1/2" thick steel is the material used?

09/02/16

#### What is the weight of the plain carbon steel used in the construction of a cylinder that has a radius of 5"

What is the weight of the plain carbon steel used in the construction of a cylinder that has a radius of 5" and a height of 24" assume 1/2" thick steel is the material used?

08/21/16

#### how do I evaluate cos^2 (95 degrees)

I was assigned a math packet for an engineering class and I'm supposed to show work on all problems. Is there any handwritten way to solve this?

07/18/16

#### If a person has been riding a bike for 5 seconds and gone a distance of 30 meters (m), how fast is he or she going?

There really is no other details.

06/26/16

#### Could anyone give the work solution. its a fluid mechanics question about turbomachinery

A local ventilation system (a hood and duct system) is used to remove air and contaminants from a pharmaceutical lab (Fig. P14–51). The inner diameter (ID) of the duct is D 5 150 mm, its average...
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04/29/16

#### Advising a building contractor

A building contractor has acquired a 10 acre site and plans to develop it as a residential area. The contractor has two basic designs for homes: a low income home and a middle income home. he...
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