Lead can be dangerous when present at just 1ppb (part per billion) in drinking water. An older apartment building finds that 0.1 g of lead has dissolved into the old 1000 L water heater. Is the water safe to drink? Show your work!

The information you receive from each eye is communicated through the optic nerve to the brain. Which of the following statements correctly describes how the visual field is perceived?

The right visual fields from both eyes are processed on the right side of the cerebrum.

The visual field from the right eye crosses the optic chiasm to the right side of the brain.

The left visual fields from both eyes are processed on the right side of the cerebrum.

The visual field from the left eye crosses the optic chiasm to the right side of the brain.

which of the following best explains the voltmeter reading

Emergency room doctors often shine a light into the eyes of patients with potential trauma to the brain to test their pupillary reflex. This is an important method in determining possible damage in the following areas of the nervous system, EXCEPT the

On the reality TV show Last Man Standing, a package is thrown from a plane to the ocean below. The contestants must swim to the package to receive the “free pass” located inside the package. The path that the package follows can be modelled by the quadratic function d t 4 9. t t 10 1200 2 ^ h =- + + , where d represents the distance above the water, in metres, and t is the time, in seconds.

How long has the package been in the air when it hits the water?

Grey eyes (b) are recessive to brown eyes (B) in rabbits. In an ideal rabbit population exhibiting Hardy–Weinberg equilibrium, if allele b has a frequency of 0.23, what percentage of the population is heterozygous for this trait? 

Round your answer to the nearest whole number. 

There is a lack of dominance in four o’clock plant flowers. When a red flower is crossed with a white flower, a pink flower is produced. 

Imagine that the reduction of tin(II) ions has been selected as the reference half-cell.

What will be the new reduction potential for the reduction of chromium(II) ions?

A solution of iron(II) chloride is mixed with an acidified sodium nitrate solution identify the SOA and SRA

How would the net cell potential for the following cell be affected if the reduction of tin(II) ions had been selected as the reference half-cell? 

    Mg(s) | Mg(NO3)2(aq) || Cd(NO3)2(aq) | Cd(s)