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kenny6666 [7]
3 years ago
9

Consider the following statements about weeding and identify the incorrect one.

Chemistry
1 answer:
dolphi86 [110]3 years ago
4 0

Answer:

b) Weeding is the process of growing weed

Explanation:

Wedding is an agricultural process carried out to ensure maximum you won't do. It is the process by which weeds i.e. unwanted plants are removed.

As rightly stated in the question;

- Weeding is either done by manual means e.g Cutlasses or use of weedicides, which are chemicals.

- Weeding is best done during tiling operations.

The incorrect option is that "Weeding is the process of growing weed" rather it is a process of removing weed.

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You observe 2 waves named alpha and beta. The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz. Base
MAVERICK [17]

Answer:

shorter wavelength = alpha wave

Explanation:

Given that,

The alpha wave has a frequency of 5 Hz and the beta wave has a frequency of 2 Hz.

We need to compare the wavelengths of these two waves.

For alpha wave,

\lambda_1=\dfrac{c}{f_1}\\\\\lambda_1=\dfrac{3\times 10^8}{5}\\\\=6\times 10^7\ m

For beta wave,

\lambda_2=\dfrac{c}{f_2}\\\\\lambda_2=\dfrac{3\times 10^8}{2}\\\\=15\times 10^7\ m

From the above calculations, we find that the wavelength of the alpha wave is shorter than the wavelength of the beta wave.

8 0
3 years ago
A person's weight changes as he travels from the earth to space, but his mass remains the same.
alina1380 [7]
When a man travels from earth to space, the mass of the person, defined as the amount energy a matter has remains constant. However, when he moves to space, gravity decreases until such time that there is no gravity that acts on the person. Weight thus changes or decreases until the point of state called weightlessness.
7 0
3 years ago
Why are the coefficients before a chemical symbol important?​F. ​ They show the number of elements in each molecule.​G. ​ They i
Valentin [98]

Answer:They indicate the number of molecules of each substance

Explanation:

When we write chemical reaction equations, we usually put a number before the symbol of each reactant.

These coefficient shows the number of molecules of that specie that is involved in the balanced reaction equation for the reaction.

These coefficients are important because they are used in carrying out stoichiometric calculations.

7 0
3 years ago
What is the mass of copper that increases its temperature by 285 degrees celsius when 186,000 j of energy is applied?
Llana [10]
From reliable sources in the web, it may be searched that the specific heat of copper is approximately equal to 0.385 J/gC. The amount of heat that is required to raise a certain amount by certain number of degrees is given in the equation,
                              H = mcpdT
where H is heat, m is mass, cp is specific heat, and dT is temperature difference. Substituting the known values,
                           186,000 J = (m)(0.385 J/gC)(285C) 
                                     m = 1695.15 g
3 0
3 years ago
Read 2 more answers
You can increase the surface area of a block of ice by
lozanna [386]
Surface area<span> of a solid object is a measure of the total </span>area<span> that is occupied by the surface of object. 

If two objects has same mass, then smaller size particles will have greater surface area. 

Thus, in order to increase the surface area of ice, one can crush it into small particles. Due to crushing, particles will break into smaller size and eventually this will result in larger surface area.  </span>
3 0
4 years ago
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