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2 years ago

when a plant produces food by photosynthesis, what is the fate of food stored as sugars, starches, etc.?

1 answer:

5 0

A portion of the food is used by the plant itself in cellular respiration and the rest is consumed by animals or by decomposers.

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3 years ago

What is cross-pollination?

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3 years ago

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3 years ago

Sign an experiment.

expeople1 [14]

The answers to the questions required for the design experiment above are :

If shark attack are related to the number of elephant seals in an area, then shark attack will increase as the number of elephant seal increases

If shark attack are unrelated to number of elephant seal in an area, then shark attack is unaffected by increase or decrease in number of elephant seal.

The Control Group : Beaches or areas where elephant seals aren't present or period of the year when there are no elephant seal at the beach.

The Experimental group : Beaches where varibale portions of elephant seals are found (area with high, medium or low).

The Dependent variable : Number of shark attacks

The Independent variable : The different number of elephant seals found.

Data to be collected include : The number and type of elephant seals found at various beaches and the number of shark attacks recorded at the various points.

John will be able to deduce if the number of elephant seals and number of shark attacks recorded corded are related.

The hypothesis of an experiment is a proposition which requires experimental testing in other to establish it's validity.

The Control Group refers to a portion of the subject which aren't given or exposed to the treatment used in an experiment.

The Experimental group are the portion of the subjects which are subjected to the treatment condition.

The Dependent variable is the measured variable is changes as the independent variables are tweaked.

Independent variable is the predictor variable, it causes a change in the output of the dependent variable.

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2 years ago

Calculate the mass defect for oxygen-16 given this data. Round to the 5es001-1.jpg decimal place. mass of an oxygen-16 atom: 15.

Naya [18.7K]

Answer:

Explanation:

Given parameters:

Mass of oxygen atom = 15.994914amu

Mass of a proton = 1.00728amu

Mass of a neutron = 1.00866amu

Unknown:

Mass defect = ?

From the periodic table, the number of the elementary particles in a neutral Oxygen atom is given below:

Number of protons = 8

Number of neutrons = 8

Number of electrons = 8

Solution

The mass defect examines the difference between the actual mass of an atom and sum of masses of the nucleons.

The mass of an atom is concentrated in the nucleus which contains protons and neutrons. Electrons have little to no weight compared with the nucleons.

To calculate the mass defect, we first know the mass of the nucleons first:

1 proton has a mass of 1.00728amu

8 protons will weigh: (8 x 1.00728)amu = 8.05824amu

For the neutrons:

1 neutron has a mass of 1.00866amu

8 neutrons will weigh: (8 x 1.00866)amu = 8.06928amu

Mass of the nucleons = mass of protons + mass of neutrons

= 8.05824amu + 8.06928amu

= 16.12752amu

The mass defect = mass of the nucleons - mass of the atom

= 16.12752amu - 15.994914amu

= 0.132606amu ≅ 0.13261amu to 5 decimal places

6 0

3 years ago

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