Category: Engineering

What is the steady flow process? Steady flow process is a process where: the fluid properties can change from point to point in the control volume but remains the same at any fixed point during the whole process. A steady-flow process is characterized by the following: No properties within the control volume change with time. […]

What causes water in compressed air lines? Air gets really hot when it’s compressed, which allows it to hold more water vapor than it otherwise would. As the compressed air cools down, it can no longer hold the same amount of water vapor, so the extra water gets forced out of the air in liquid […]

What are the three types of cubic unit cells? Unit cells occur in many different varieties. As one example, the cubic crystal system is composed of three different types of unit cells: (1) simple cubic , (2) face-centered cubic , and (3)body-centered cubic . These are shown in three different ways in the Figure below […]

What does revocation of driver license mean? A revoked driver’s license means your license has been fully canceled and cannot be reinstated. It is possible to have your driver’s license revoked or even permanently revoked due to multiple driving offenses, medical conditions, and age. What happens when you get pulled over with a revoked license? […]

What would happen if all the propellers on a quadcopter rotated in the same direction? Placement of motors and propellers in a quadcopter Hence, if all motors rotate in the same direction, then the quadcopter will keep rotating (or yaw) in that direction. For example, increasing the speed of two counter-clockwise motors will yaw the […]

What happens when hydrogen and oxygen combine to form water? When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide. For both of the reactions shown, the hydrogen molecules are oxidized and […]

What is wash in and wash out? Wash in is a progressive increase in angle of incidence of the wing from root to tip, whereas wash out is decrease in incidence. Wash out is helpful in keeping the outer wings at lower Angle of attack as compared to root. This retains aileron control at high […]

How do you calculate the efficiency of a wheel and axle? In order to calculate the mechanical advantage of a wheel and axel, you can divide the radius of the wheel by the radius of the axle. If a wheel’s radius is 60cm and its axle is 30cm, what is the mechanical advantage of the […]

How can man in middle attack be performed in Diffie Hellman algorithm? “The Diffie-Hellman key exchange is vulnerable to a man-in-the-middle attack. After this exchange, Carol simply decrypts any messages sent out by Alice or Bob, and then reads and possibly modifies them before re-encrypting with the appropriate key and transmitting them to the other […]

How do you calculate the coefficient of a FIR filter? h(N-1)[cos((N-1)w) – jsin((N-1)w)] , or Consider a DC (zero Hz) input signal consisting of samples which each have value 1.0. After the FIR’s delay line had filled with the 1.0 samples, the output would be the sum of the coefficients. Therefore, the gain of a […]