44 Answered Questions for the topic Engineering

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... more

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... more

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... more

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... more

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... more

05/11/19

What is the origin of the word, "tribology"?

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... more

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... more

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... more

01/03/18

How do you know when to use an augmented matrix?

Bit confused please can someone clarify. 

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... more

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... more

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... more

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... more

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?

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... more

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... more

04/21/16

help me if you can

can you turn metric tons/yr to mg/Ncm
1

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