Cloning cannot improve dog breeds as:

1) cloning is using parental DNA to breed which has exactly the same set of genetic information be it good or not.

2) clones will not necessarily look identical to donor.

3) premature aging and problems with immune system and life span of clone may already be shorter than normal due to shorter chromosomes.

Pros:
1) by accepting the aid, there is a higher potentential in producing higher crop yields.
2) in addition the people do not have to starve during the long drought, avoiding the risk of facing famine.

Cons:
1) Some of the genes used in Genetically
modified(GM) technology might be taken from a food that causes allergies in some people. Also, a new allergen could be produced when genes are mixed across different species.

2) Some GM food are modified using bacteria and viruses, there is a fear that we will see the emergence of new diseases.

Nevertheless, despite the risk, we should be accepting the supply of GM corn as we need the food to survive.

a) C6H12O6 can also be written as C6(H2O)6.

b) CH2O- CH2O-CH2O-CH2O-CH2O-CH2O

c) Isomers are molecules that have the same molecular formula, but have a different structural arrangement. They are not likely to have the same level of sweetness, due to the structural and properties differences of isomers.

It is impossible because food like milk, cream, ground coriander and other spices has high concentration of phthalate. It is common in food that has high fat dairy and animal fats. Furthermore, the process of packaging the organic food are exposed to high phthlatate concentration.

All food will have chemicals, thus it is impossible.

Acetone dissolves the polymer, allowing the gas of the foaming agent to escape. The polymer collapses on itself and is more dense because the gas has been removed.

a) LDPE cannot be used in this application because it does not have the required strength.

b) The molecules of HDPE must line up in a way that produces the required strength. Using a thin liner of HDPE allows sufficient flexibility.

When the piece of plastic is stretched, the strip narrows and “necks down.” The molecules become aligned parallel to each other and in the direction of the pull. This alteration of the three-dimensional structure is not reversible, and if the pulling continues, the plastic breaks. When the same pulling force is applied to a piece of paper, the paper tears rather than stretching to any significant extent. The cellulose molecules in paper are held far more rigidly in place, and are not free to become aligned.

a) The benefits for polymers intended for use in the body should far outweigh any risks. The two main properties are
(1) stable over time of intended use and
(2) non-toxic.
Other factors to consider are low cost, lack of solubility in body fluids, lack of reactivity in body fluids, and the ease of implantation

b) Different contact lenses would use different types of polymers. Polymethyl methacrylate (PMMA), is a polymers used for rigid gas permeable lenses, is structurally similar to Lucite and plexiglas. Silicone-acrylate materials now are more commonly used under the name of Kolfocon. Newer rigid gas permeable (RGP) polymers contain fluorine: fluoro-silicone-acrylate polymers and fluoro-silicones. Polymacon (38% water) is typical of the polymers used for soft lenses and is a polymer of 2-hydroxyethyl methacrylate (HEMA).

Desirable properties include being nontoxic, permeable to oxygen, comfortable to wear, and inexpensive. Also desirable is the ability to conform to the shape of the eye and to be easily cleaned (if not disposable).

c) Hard contact lenses are typically made of Polymethyl methacrylate (PMMA), a rigid non-gas permeable plastic. The soft contact lenses that replaced them are made of silicone, which is flexible and allows oxygen to reach the eye. Because of these properties, the soft lenses tend to be more comfortable.

One carbon atom can differ from another in the number of neutrons (such as C12 and C13) and in the number of electrons. All carbon atoms differ from all uranium atoms in the number of protons, neutrons , electrons as well as their chemical properties.

The symbol N represents the element Nitrogen and stands for the naturally occurring mixture of all isotopes. The symbols 14N, 15N actually represent specific isotopes with mass numbers of 14 and 15 respectively

A: 94 protons

B: 93 protons is Np (Neptunium), 94 protons is Pu (Plutonium)

C: 86 protons. Randon is largest natural source of background radiation, a radioactive gas that is formed in the decay series of uranium.

A: Control rods assembly

B: Cooling water out of the core

C: Control rods

D: Cooling water into the core

E: Fuel rods

One carbon atom can differ from another in the number of neutrons (such as C12 and C13) and in the number of electrons. All carbon atoms differ from all uranium atoms in the number of protons, neutrons , electrons as well as their chemical properties.

The symbol N represents the element Nitrogen and stands for the naturally occurring mixture of all isotopes. The symbols 14N, 15N actually represent specific isotopes with mass numbers of 14 and 15 respectively

A: 94 protons

B: 93 protons is Np (Neptunium), 94 protons is Pu (Plutonium)

C: 86 protons. Randon is largest natural source of background radiation, a radioactive gas that is formed in the decay series of uranium.

A: Control rods assembly

B: Cooling water out of the core

C: Control rods

D: Cooling water into the core

E: Fuel rods

These techniques are expensive as they require the use of energy to remove salts from seawater/brackish water. Hence, incurring a higher cost. Mainly countries with strong economy are able to afford. If a cheaper option such as hauling fresh water from a distance is available, the more feasible option will be used.

We would expect the water-soluble vitamins to be polar and the fat-soluble vitamins to be non-polar. This is due the ‘like dissolve like’ property where water is polar and hence the water-soluble vitamins are soluble in water would be polar . If the fat-soluble vitamins dissolves in fats which is non-polar, the fat-soluble vitamins would be non-polar too.

a) Hanging the laundry to dry requires no electrical energy as it requires energy from the sun to dry. However if a electric dryer was use, it will require electricity and the power plant will need to burn more coal to produce electricity.

b) all the options are better as compared to driving. It is because the carbon emission for burning gasoline will be much higher than the options above.

c) By running these appliances in full loads will be better as it require less energy.

d) Adding additional insulation on hot water heaters and pipe would keep the water warm longer and the heater will not need to use much energy to reheat the water in the tank.

e) buying anything locally will be better as long distance transport contributes to more carbon emission into the atmosphere.

a) If there is a connection, it is because coal plants release huge amounts of water vapor along with the combustion process. The hydrogen and carbon in the coal make at least twice the amount of water vapor and small amounts of SO3 droplets as the coal burnt: CH4 + O2 —> CO2 + 2H2O.
Water vapor when cooled in the hilly forest area of this national park becomes visible as a fog. This happens in the Great Smoky Mountain Park area also, but is more because of all the lakes emitting vapor which cools at night and makes them look “smoky”.
So the connection is probably higher for coal plants in certain areas that have cooler night time temperatures that lead to high fog formation and cooler day temperatures that make the fog last longer

b) The average pH of rain should be neutral which is pH = 7. The pH scale is a log scale , so if the acid level is 10 times stronger that is equal to 1 pH. So in this case the pH would be pH 6.

a. Exothermic, as charcoal briquette releases heat as it burns.
b. Endothermic, as the water absorbs the heat necessary for evaporation.
c. Endothermic, as heat is absorbed from the environment to break the bonds of ice.

The bond energies of the products are larger than these of the reactants. This will lead to a large negative energy change, indicating an exothermic reaction.

Temperature is a form of measurement to indicate how heat flows while heat is a form of energy. Heat flows from a hotter object to a cooler object. Hence, an example would be, pouring hot water to a cup of cold water. The heat from the hot water will flow to the cold water and the final temperature will be a mixture between the two solutions.

a. Gasoline with an octane rating is composed of 98% isooctane and 2% n-heptane. As it is a ‘premium gasoline’, it has a high resistance to knocking.
b. Octane rating does not contain any information pertaining to the fuel containing oxygenates or not. Other labels around the pump will contain this information.