PLEASE ANSWER ASAP!
For her school Science ft Alyssa designs an experiment to learn more about
erosion. Her experimental set up is shown below
Using the illustration shown above, determine which of the following statements best
describes the independent variable itest variable). this experiment:



A The speed she pours the water, since it is the same for all trials.

B The amount of water she pours, because the amount she pours is the same.

C The height of the tray, because this is a change that may cause and effect on the experiment.


D The mass of sand that collects at the bottom of the tray, because this is what is being measured or observed.

Answer:

102 degrees, the intervals go by 2

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 0.79 g/mL

1 L = 1000 mL

6.5 L = 6500 mL

We have

mass = 0.79 × 6500

We have the final answer as

Hope this helps you

Answer: Calcium Cyanide?

Explanation:

Answer:

Physical changes involve states of matter and energy.

Explanation:

No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.

The characteristics that can be changed in the physical change has been shape or size of the compound.

Change in the element has been classified as chemical and physical change. The chemical change has been given as the change in the chemical composition of the elements.

The physical change has been the change in the state and form of the element, that has been reversible.

The characteristics that can be changed in the physical change has been shape or size of the compound.

For more information about the physical change, refer to the link:

https://brainly.com/question/1984022

Answer:

1. a) 1.27 mol H₂SO₄

2. b) 19 g KCl

Explanation:

The grass method is an acronym for Given, Required, Application, Solution, Statement.  

1. a) Given, 125g H₂SO₄; Required, find the moles H₂SO₄; Application, 125g x molar mass of H₂SO₄, Solution, [tex]125g H2SO4 * \frac{1molH2SO4}{98.08gH2SO4} = 1.274469molH2SO4[/tex] Statement, Round to the lowest number of significant figures to get 1.27 mol H₂SO₄;

2. b) I am only show the equation for this one, but it is basically the same as the previous one. The molar mass of KCl is 74.55 g/mol.

[tex]0.25molKCl*\frac{74.55gKCl}{1molKCl} = 18.6375 gKCl[/tex]

Round to the lowest number of significant figures which is two to get 19 g KCl.

For 3 the unit converter between moles and molecules is 6.022 x 10²³ molecules/mol.

Let me know if you need more help.

Answer:

Josue

Explanation:

J.J Thompson proposed the plum pudding model of the atom. In his proposition, the atom is a sphere of positive charges into which negative charges were embedded. This model of the atom did not significantly contribute to our present day understanding of atomic structure.

On the other hand Ernest Rutherford laid out the foundation for a more accurate understanding of atomic structure in his nuclear model of the atom. According to Rutherford, the atom consists of a positively charged massive core called the nucleus around which electron move in orbits. His idea was akin to the solar system with the sun at it's core and planets moving around the sun in orbits.

This his idea of the nuclear theory was held as fundamentally correct by Neils Bohr's model of the atom. Hence, his nuclear theory of the atom was a significant milestone in our present day understanding of atomic structure.

Answer:

C. An intitial velocity that is faster than a final velocity.

Explanation:

taking the test rn but it makes sense because you'd have to slow down to get  a lesser final velocity.

Answer:

C

Explanation:

Given parameters:

Distance of ATV  = 60miles

Time = 2hrs

Unknown:

Speed  = ?

Solution:

Speed is a scalar quantity. It has magnitude but no direction. Mathematically, speed is distance divided by time.

                      Speed  = [tex]\frac{distance}{time}[/tex]

 Input the parameters;

              Speed  = [tex]\frac{60}{2}[/tex]  = 30miles/hr

The speed of the ATV is 30miles/hr

Answer: Technically, yes. Are bodies are primarily made of carbon, which is found in pretty much everything. Stars, planets, plants, etc.

Explanation:

Answer:

The study population is the subset of the target population available for study (e.g. schizophrenics in the researcher's town). The study sample is the sample chosen from the study population.

Explanation:

In research terminology the Population can be explain as a comprehensive group of individuals, institutions, objects and so forth with have a common characteristics that are the interest of a researcher. Any value which is identified or measured from the characteristics of entire population can be called as Parameter.

Answer:

atomicity of water is 3

Explanation:

Answer:

please mark brainliest!

Explanation:

one molecule of water contains two atoms of hydrogen and one atom of oxygen, the atomicity of water is three.

Answer:

The answer is

Explanation:

To find the number of atoms of titanium , given it's number of moles we use the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 0.075 mol

We have

N = 0.075 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Explanation:

Hassium belongs to d-block of the periodic table.

Answer:

You need the Delta H fusion for water. Multiply that by 50 grams. Then multiply 50 g x 4.184 x 65 to get joules to raise water to 65 degrees. Add these values together to get total joules.

Explanation:

Answer:

It can help identify elements quicker.

Explanation:

Answer:

1 pm = 10^-12 m = 10^-10 cm = 10^-9 mm

1.04 x 10^-3 pm = 1.04 x 10^-3 x 10^-9

= 1.04 x 10^-12 mm.

Hope it helps...

Answer: Crater and lava flow

Explanation:

Answer:

1s^2 2s^2 2p^6 3s^2 3p^4

Explanation:

i has picture here of correctness.

Answer:

The density of ice ice is lesser than that of water that's why ice floats on water. So hence, the answer is C

Answer:

Less than that of water

Explanation:

This explains why icebergs float on water. If it was greater than that of water icebergs would sink.

If this helped please consider marking me as brainliest.

Answer:

A gas is evolved

The ingredients can not be recovered

Explanation:

A chemical change is one in which a new substance is formed and it is not easily reversible.

One major ingredient used in cake baking is the baking powder or baking soda.

Baking a cake can be viewed as a chemical change. This is because, when the baking powder or soda is added in the presence of yeast, carbon dioxide gas is evolved as tiny bubbles of gas which makes the cake light and fluffy. Heat is equally given off in the process. The baking powder and other cake ingredients can not be recovered, hence, we can conclusively assert that a chemical change has taken place.

Answer:

Coffee

Tea

Juice

Bleach

Salt water

Explanation:

Answer:

What do you need help on

Explanation:

Answer:

The density of aluminum is 2.7 g/cm³. Thus given sample is aluminum.

Explanation:

Given data:

Mass of sample = 54 g

Volume of sample = 20 cm³

Density of sample = ?

Is the sample is aluminum = ?

Solution:

We will calculate the density from given mass and volume.

d = m/v

d = density

m = mass

v = volume

d = 54 g/ 20cm³

d =  2.7 g/cm³

From literature it is known that the density of aluminum is 2.7 g/cm³. Thus given sample is aluminum.

Answer:

Nucleus is the answer of your question

Answer:

nucleus is your awnser