What is the default tolerance zone shape for a position tolerance? If the tolerance is preceded by a diameter symbol (⌀), the tolerance is a diameter or cylindrical shaped zone, as in the position of a hole. If there is no symbol preceding the tolerance, the default tolerance zone shape is parallel planes or a […]
What is required for current to flow through a conductor?
What is required for current to flow through a conductor? In order for a current to flow, the circuit must be closed; in other words, there must be an uninterrupted path from the power source, through the circuit, then back to the power source. Voltage is sometimes called electric potential and is measured in volts. […]
Do you say hello everyone or everybody?
Do you say hello everyone or everybody? The only difference between, “Hi everybody” and “Hi everyone” is , “everyone” is more formal. But both are correct greetings. You can also say, “Hi all”. Which is correct everybody or everyone? Everyone and everybody mean the same. Everyone is a little more formal than everybody. Everyone is […]
Who is responsible for training workers on the use of PPE?
Who is responsible for training workers on the use of PPE? In general, your employer is responsible for: Continually working to identify and control hazards. Providing appropriate PPE for employees. Training employees in the use and care of the PPE. Do employees need to be trained in the use of PPE? 1910.132(f)(1) The employer shall […]
Why does HF have a higher boiling point than F2?
Why is aluminum used for Xray beam filtration?
Why is aluminum used for Xray beam filtration? Beryllium is commonly used in mammography (which use low-energy photons) as it provides very little filtration. Other types of x-ray generally use aluminum, copper or tin. This is due to the loss of lower energy photons from a polychromatic beam. The average x-ray energy is increased and […]
How do dislocations increase strength?
How do dislocations increase strength? Plastic deformation occurs when large numbers of dislocations move and multiply so as to result in macroscopic deformation. Pinning points, or locations in the crystal that oppose the motion of dislocations, can be introduced into the lattice to reduce dislocation mobility, thereby increasing mechanical strength. How does a dislocation allow […]
What is acceptable dB loss for single mode fiber?
How do you calculate the open circuit voltage of a solar cell?
How do you calculate the open circuit voltage of a solar cell? As we know, the open circuit voltage equals to the quasi-Fermi level separation of a solar cell under illumination. Common way to calculate the voltage is using the equation, KT/q*ln(Iph/I0+1). What is open circuit voltage and short circuit current in solar cell? The […]
What is tetragonal unit cell?
What is tetragonal unit cell? The tetragonal unit cell is distinguished by an axis of fourfold symmetry, about which a rotation of the cell through an angle of 90° brings the atoms into coincidence with their initial positions. Crystals in a tetragonal system are characterized by three mutually perpendicular axes, two of which are equal […]