Mastering Laboratory Balances Quiz

<p>Arms are unequal in length</p> Signup and view all the answers

<p>To indicate when the balance is in equilibrium</p> Signup and view all the answers

<p>The two types of laboratory balances mentioned in the text are the double pan balance (direct comparison) and the single pan balance (substitution). The double pan balance has a single beam with arms of equal length, and standard weights are manually added to the right side to counterbalance the object weight. In contrast, the single pan balance has arms of unequal length, and the object is placed on the short arm pan with a restoring force mechanically applied to the other arm until the indicator is balanced.</p> Signup and view all the answers

<p>The main parts of a triple beam balance are the base, pan, adjustment knob, pointer, triple beams, and rider. The base is a solid metal platform that supports the rest of the parts. The pan is where the object to be weighed is placed. The adjustment knob can be turned to attain greater accuracy while measuring the weight of an object. The pointer is present on the right-hand side of the triple beam balance. The triple beams comprise three beams that are individually used to determine the mass of an object, and the rider is used to move along the length of the beam to determine the object's mass.</p> Signup and view all the answers

<p>The principle behind the digital or electronic balance is electromagnetic force. It can weigh as little as 0.1 ug (0.00001g) and is used for most critical weighing. The advantages of digital or electronic balance include high precision, ease of use, and the ability to measure very small weights accurately.</p> Signup and view all the answers

<p>Some safety and quality assurance practices mentioned in the text for using laboratory balances include keeping balances clean and wiping up any spills immediately.</p> Signup and view all the answers

<p>The rider on a triple beam balance is used by the user to move along the length of the beam to determine the object's mass. It is used to achieve balance in conjunction with the triple beams, allowing for the accurate measurement of an object's mass.</p> Signup and view all the answers