How many quantum states are possible for an atomic electron for which n = 4?
how many quantum states are possible for an atomic electron for which n = 2 and m = 0?
find the de broglie wavelength of an electron accelerated across a 22,600 v potential difference in a tv tube.
a geiger counter reading of a radioactive sample is initially 7220 counts per minute. the same sample gives a reading of 402 counts per minute 10.9 h later. what is the sample's half-life?
if a rock containing u-238 initially reads 64.4 counts per minute on a geiger counter, what will its reading be 3 weeks later?
find the activity of a sample containing 8.73 multiply. gif 1014 iodine-131 nuclei (t1/2 = 8.0 days)
find the activity of a sample containing 5.91 multiply. gif 10-6 g of _27^60 text(co) (t1/2 = 5.27 years).
find the binding energy and the binding energy per nucleon of the _92^238 text(u) nucleus

1. the materials manager for a billiard ball maker must periodically place orders for resin, one of the raw materials used in producing billiard balls. she knows that manufacturing uses resin at a rate of 50 kilograms each day, and that it costs $.04 per day to carry a kilogram of resin in inventory. she also knows that the order costs for resin are $100 per order, and that the lead time for delivery is four (4) days.2. at what point should resin be reordered? a. 0 kilograms remainingb. 50 kilograms remainingc. 200 kilograms remainingd. 400 kilograms remaininge. 500 kilograms remaining3. if order size was 1,000 kilograms of resin, what would be the length of an order cycle? a. 0.05 daysb. 4 daysc. 16 daysd. 20 dayse. 50 days4. if the order size was 1,000 kilograms of resin, what would be the average inventory level? a. 50 kilogramsb. 200 kilogramsc. 500 kilogramsd. 800 kilogramse. 1,000 kilograms5. if the order size was 1,000 kilograms of resin, what would be the daily total inventory costs, excluding the cost of the resin? a. $5b. $10c. $20d. $25e. $40