Why is it important to zero the balance before using it?
The mass of substance taken is determined by subtracting the second reading from the first. When weighing by difference an exact zeroing of the balance is not required because any error in initial reading will cancel when subtraction of the readings occurs.
Can portfolio weights be more than 1?
Weights larger than 1 would mean if you have 100 000 USD you invest more (by taking credit or using futures where you only post margin). For negative weights it works similarly.
How do you calculate portfolio return?
To calculate the expected return of a portfolio, you need to know the expected return and weight of each asset in a portfolio. The figure is found by multiplying each asset’s weight with its expected return, and then adding up all those figures at the end.
What is the maximum load to be weight on weighing balance?
The usual maximum capacity for the analytical balance is 110 g.
How do you calibrate balances with weights?
Switch on the scale, allow it to warm up and then press the button or key for “auto-calibrate” or “calibrate”. Most internal calibrations will first display a “no weight” measurement, and then require a specified standard check weight to be placed on them. After placing the weights, verify the use range of the balance.
What’s the minimum number of weighs required for finding?
(If the last group is only 1 ball you need not weigh it to deduce it must be the one ball of different weight.
How to choose weights that minimize portfolio variance?
I am looking for such weights that minimize variance of the portfolio. Here are two examples of randomly chosen weights:
What’s the minimum number of weighs required for finding the odd ball if given?
Closed 9 years ago. If there are 9 balls among which if 1 ball is of different weight, it requires minimum of 2 weighs to find the odd ball. If there are 27 balls, it requires 3 chances. 9 -> 3 pow 2 -> 2 chances. 27 -> 3 pow 3 -> 3 chances. Question: Whats the minimum number of weighs required for finding the odd ball if given ?
