Category: Engineering

How do you convert PWM to analog signal? Fortunately, it is easy to convert a PWM output to an analog voltage level, producing a true DAC. All that is needed is a simple low-pass filter made from a resistor and a ceramic capacitor. The simple RC low-pass filter shown in the third photo converts the […]

How many RPM is a 8 pole motor? 900 rpm How do you calculate the power rating of a motor? Multiply the motor voltage by the full-load current. The result is in watts. Divide watts by 1,000 to give kilowatts. For example, 230 volts x 20 amps = 4,600 watts; 4,600 watts divided by 1000 […]

What kind of force keeps you in your seat when you go around a loop on a roller coaster? inertia How do you find the speed of a roller coaster at the top of a loop? For a roller coaster loop, if it were perfectly circular, we would have a minimum speed of vmin=√gR at […]

What is footing in construction? Footing is a part of foundation which is constructed with concrete or brickwork masonry and acts as a base to the floor columns and floor walls. The main function of footing is to transfer the vertical loads directly to the soil. The term footing is used in conjunction with Shallow […]

How do you calculate die volume? The formula to find the volume multiplies the length by the width by the height. The good news for a cube is that the measure of each of these dimensions is exactly the same. Therefore, you can multiply the length of any side three times. This results in the […]

Is Social Security giving a cost-of-living increase for 2020? The Social Security Administration on Thursday announced a 1.6% cost-of-living adjustment for 2020, meaning the average retiree will get $24 more each month, or about $1,503. In 2019, the COLA was 2.8%, an increase of about $40 a month for retirees. How much is a 1.6 […]

What is the diameter of a cylinder? The diameter, or the distance across a cylinder that passes through the center of the cylinder is 2R (twice the radius). The surface area of an open ended cylinder (as shown) is 2 RL. What is called the internal diameter of the cylinder? The diameter of the piston, […]

What is Aashto method? The current AASHTO method is a regression method based on the results of road tests. The AASHTO method utilizes an index termed the “structural number” (SN) to indicate the required combined structural capacity of all pavement layers overlying the subgrade. How do you calculate structural number of pavements? The Structural Number […]

What is the fundamental principle involved in electromechanical energy conversion? For example, an electric motor converts electric energy into mechanical energy. If the conductor is free to move in the direction of the magnetic force, the magnetic field aids in the conversion of electric energy into mechanical energy. This is essentially the principle of operation […]

What is a framing plan? Framing plans for floor and roof construction can be derived directly from the floor plan and must incorporate all information that deals with the configuration of the building. Further, the framing plan shows the layout of the supporting features such as bearing walls, columns, beams, and girders. What is a […]