What can the speaker do to help the audience better receive the message? Key Points The speaker can direct the attention of the audience to what is important by using changes in rate and volume, body movement, and gesture to emphasize what is important. It is important to read the non-verbal clues of the audience […]
What is the efficiency at maximum power transfer condition?
What is the efficiency at maximum power transfer condition? The efficiency is only 50% when maximum power transfer is achieved, but approaches 100% as the load resistance approaches infinity, though the total power level tends towards zero. Efficiency also approaches 100% if the source resistance approaches zero, and 0% if the load resistance approaches zero. […]
What is a bimetallic strip made of?
What is a bimetallic strip made of? The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper, or in some cases steel and brass. How does a bimetallic strip work? Bimetallic strips A traditional thermostat has two pieces of different metals bolted together […]
Which of the following yielding criteria is more conservative for ductile materials?
Which of the following yielding criteria is more conservative for ductile materials? Of the failure criteria, the Tresca is the most conservative for all materials, the von Mises the most representative for ductile materials, and the Rankine the best fit for brittle materials. Which is most suitable theory of failure for ductile materials? 83 – […]
How do we get the impulse response function H T of a system given a system equation?
How do we get the impulse response function H T of a system given a system equation? Given the system equation, you can find the impulse response just by feeding x[n] = δ[n] into the system. If the system is linear and time-invariant (terms we’ll define later), then you can use the impulse response to […]
Which materials are good conductors and which are good insulators?
Which materials are good conductors and which are good insulators? Wool, dry air, plastics, and polystyrene foam are all examples of good insulators. Materials that do not insulate well are called conductors. Conductors have loose bonds that allow particles to move easily and transfer energy from one particle to the next. Metals tend to be […]
How do you calculate hydraulic conductivity from permeability?
How do you calculate hydraulic conductivity from permeability? It is the soil’s hydraulic conductivity after the effect of fluid viscosity and density are removed. It is calculated as hydraulic conductivity (K) multiplied by the fluid viscosity divided by fluid density and the gravitational constant. Permeability (k) has the dimension of area (e.g., cm2). What does […]
How much thrust does it take to lift 100KG?
How much thrust does it take to lift 100KG? To lift a 100KG payload you need thrust greater than Payload +vehicle weight+ fuel weight + excess thrust to accelerate. The Williams FJ33 is in the 5000-7000N thrust range, with a basic dry mass of about 150Kg. What aircraft has the best thrust-to-weight ratio? For many […]
Is it better to wire solar panels in series or parallel?
Is it better to wire solar panels in series or parallel? The main thing to remember is that wiring in series will increase your voltage, while wiring in parallel will increase your amperage. Both of the voltage and amperage need to be considered when designing your system, especially when it comes to finding an inverter […]