Given a rock which has three times as much lead as Uranium-235 in it, how old is the rock assuming all the lead in the rock started as Uranium? The half-life of Uranium-235 is 7x108 years. Given a block of Uranium-235, how long before 75% of the block has turned to lead?

How is the presence of a magnetic field related to the rate of rotation of a planet?

Reducing atmosphere? Oxidizing atmosphere?

A woman spots a man entering into her neighbours house while her neighbour is away. She calls police and the suspect is accused of burglary. There appears to be actus reus here in that the accused entered the house. What are the possible defences can a lawyer raise here? (list at least 5 possibilities and explain how they relate to mens rea)

Describe why a coastal location, like Santa Monica or San Diego, has a more moderate climate throughout the year than an inland location like Little Rock, AR or Dallas, TX? Provide 4 main reasons.

Discuss the different stages of a mid-latitude cyclonic storm from birth to decay according to the polar front model.

• How does the magnitude of the sea level pressure change with time?
• How does the associated frontal structure change with time?
• Why do they tend to die out after they become occluded?

For a solar system located in Colorado, how many flat-panel solar collectors with dimensions of 1 m x 1.5 m and an efficiency of 58% would be required to heat up 80gallons of water from 65°F to 120°F during the month of January? NUMBER OF PANELS

2.Calculate the specific enthalpy change in kJ / kg-C of the following processes:

a) cyclohexane gas in a process from T0 = 300C to Ft= 900 C

b) hydrocyanic acid gas from T0 = 900C to Ft = 300 C.

Which of the two processes requires more energy? Which one would you use to heat a stream of 100mol / h water that must enter a heater at 25ºC and leave at 80ºC? Would it reach you?

1. Storms

What is the difference between mid-latitude and tropics cyclones? Why do cyclones rotate counter-clock wise in the northern hemisphere but clock-wise in the southern hemisphere as shown in the chart below? Unlike hurricanes, why is it difficult to predict the time when a tornado occurs? Explain why the Midwest U.S is considered as a ‘tornado alley?’ Why are the months of May and June the peaks times for tornado occurrence? must be 350 words long

How would you make a 1.75M solution of sucrose using solid sucrose, a 2mL graduated pipet, and a 25mL volumetric flask?

How would you make a 0.500M solution of sucrose by diluting the solution in the previous question?

Governments are now preparing for the impacts of climate change by developing adaptation policies in key areas. Other key areas include innovations in how we live our lives. Outline the factors that must be considered in devising an effective strategy to minimize risks and vulnerabilities for Canadians in each of the following areas:

Water resources

Agriculture or forestry

Human health

Urbanization

Northern community development

Why was the battle of Midway so important to the United States?

give some explanation please

In what ways do the minerals in the discontinuous series differ from each other? And the minerals in the continuous series?

Two climates have distinct alternating wet and dry seasons. Name them, and mention the time of year when each has its wet season, then explain the cause (the specific weather elements) for the wet season in each

(Please be as thorough as possible)

Rocks collected on the coast of northern Greenland, at a latitude of 76.5 degrees North are brought into the paleomagnetic lab for study. You collect a number of samples and find that the magnetic field preserved within them varies slightly, but that the group has an average inclination of -75 degrees and a declination of 135 degrees. Geochemical dating show that all the rocks are 60 My old.

2) describe how these rocks have moved since forming (Be as specific as possible) and determine at what speed must these rocks have traveled since their formation? is this a minimum or maximum estimate of their velocity?

THE IMPACT OF TECHNOLOGY ON MEDICAL BIOTECHNOLOGY

AND

DEVELOP A ONE-PAGE REFLECTION ON IT!

Silica nanoparticles are synthesized through the sol-gel method. The size of the nanoparticles is controlled by the amount of water. Why is the size of nanoparticles controlled by the amount of water?