December 2020

An archer shoots an arrow of mass 0.0204 kg using a crossbow. If the archer aims the crossbow horizontally and the arrow leaves the crossbow at a speed of 15.6 m/sm/s, how much work would the crossbow have done to accelerate the arrow to said speed? (Assume air resistance can be neglected.)

Which of the following reactions are redox reactions? Check all that apply. SO3(g)+H2O(l)→H2SO4(aq) Mg(s)+Br2(l)→MgBr2(s) 4K(s)+O2(g)→2K2O(s) Al(s)+3Ag+(aq)→Al3+(aq)+3Ag(s) ___NH3 + ___O2 —> ___NO2 + ___H2O What mass of NO2 can be produced from 8.46 x 1022 molecules of oxygen? 23.7g of NH3 would be able to produce how many moles of H2O? How many grams of O2

Mechanical pencil lead is manufactured with a mean width of 0.9 mm. because of variability in the manufacturing process,  of distribution of the width for the pencil lead is approximately normal with a standard deviation of .004mm. if any pencil lead  thinner than .8938mm is discarded what proportion of the pencil lead is not discard .

Silver solder is a mixture of 40 % tin, 40% silver, 14% copper, and 6% zinc. If you have 60 grams of silver solder, how much of each substance do you have? Write a simple calculator program in PHP using switch case. Joe took out a car loan for $12,000. He paid $4,800 in interest

A poll sampled 75 people, asking them their favorite skittle flavor by color (green, orange, purple, red, or yellow). A separate poll sampled 98 people, again asking them their favorite skittle flavor, but rather than by color they asked by the actual flavor (lime, orange, grape, strawberry, and lemon, respectively). The table below shows the results from both polls.

Newland Retailers accepted $75,000 of Citibank Visa credit card charges for merchandise sold on July 1. Citibank charges 4% for its credit card use. The entry to record this transaction by Newland Retailers will include a credit to Sales of $75,000 and a debit(s) to Question 16 options:

Define convenience store. Write a balanced equation for solid aluminum metal reacts with diatomic bromine gas to form solid aluminum bromide. A new company president is said to have caused the company “to do a 180.” Before the new president, the company was losing money. What is the company most likely doing under the new president?

Debt Management Ratios Trina’s Trikes, Inc. reported a debt-to-equity ratio of 1.94 times at the end of 2018. If the firm’s total debt at year-end was $10.60 million, how much equity does Trina’s Trikes have? Multiple Choice 1. $5.46 million 2. $20.56 million 3. $10.60 million 4. $1.94 million

Chromium sulfate is an inorganic compound used as a tanning agent for leather manufacturing. It is produced after the reduction of potassium dichromate. The potassium dichromate is treated with 80% aqueous sulfuric acid solution and 20% excess H2O2 by the following reaction: K2Cr2O7 + 4 H2SO4 + 3 H2O2 à K2SO4 + Cr2(SO4)3 + 7

If you want your 12.6 V car battery to power your new 200 V aftermarket sound system, what is the required ratio of loops on the primary coil to loops on the secondary coil? Given the nature of the implementation lag discussed in the text, discuss possible measures that might reduce the lag.