Calculate ΔU of a gas for a process in which the gas absorbs 45 J of heat and does 11 J of work by expanding.

What is the minimum mass of ice at 0.0 °C that must be added to 1.00 kg of water to cool the water from 28.0 °C to 12.0 °C? (Heat of fusion = 333 J/g; specific heat capacities: ice = 2.06 J/g⋅K, liquid water = 4.184 J/g⋅K)

Which of the following molecules or ions are isoelectronic: SO3, NF3, NO3–, CO32–?

Which of the following ranks the regions of the electromagnetic spectrum from shortest to longest wavelength.

For questions 20-21 use the following R output from a ARMA(1,2)-GARCH(1,1):    

Which of the following best describes the difference between the ARCH(q) and GARCH(p, q) models? 

Which of the following is a limitation of ARCH models (select all correct responses):  

The ARCH model assumes positive and negative shocks have the same effect on volatility because it depends on the log of the previous shocks 

We have a GARCH model that can be expressed as

You want to predict GDP growth using both past values of the GDP time series itself and external factors like interest rates. Which time series model would be the best choice for the GDP series?