A soccer ball is rolling across a soccer field. The system consists of the
ball. The force of gravity pulls down on the ball as it rolls. Is the work positive or negative?

Answer:

Dy = - 0.0789 [m]

Explanation:

The vertical component of the vector can be determined with the sine of the angle.

Dy = 0.250*sin(18.4)

Dy = 0.0789 [m]

As the y-component is pointing downwards the component is negative.

Dy = - 0.0789 [m]

Answer:

Explanation:

I think its

c.d and a.a

im so sorry if i get it wrong

Answer:

4km

Explanation:

Distance=speed x time

Knowing this we know the time and speed

so it is 8 x .5= D

And 8 x .5 =4

If you have any questions let me know

Answer:

Kinetic energy increases and potential energy decreases when the velocity of an object increases

Answer:

Wheres. The. Pics. Of. The. Structures

Explanation:

Answer:

For starters the membrane voltage is the same in nerve cells as in muscle cells.

As for skin and muscle cells, both cells arise from the same type of embryonic layer, the ectoderm and both which produces energy, though skin cells eventually lose their organelles.

Answer:

hjkjjjrjebdbnnd heudhdb

Initial velocity (u) = 10.8 m/s

Final velocity (v) = 3.7 m/s

Acceleration (a) = -2.67 m/s²

By using equation of motion, we get:

[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow 3.7 = 10.8 + ( - 2.67)t \\ \\ \rm \longrightarrow 10.8 - 2.67t = 3.7 \\ \\ \rm \longrightarrow (10.8 - 10.8) - 2.67t = 3.7 - 10.8 \\ \\ \rm \longrightarrow - 2.67t = - 7.1 \\ \\ \rm \longrightarrow \dfrac{ - 2.67}{ - 2.67} t = \dfrac{ - 7.1}{ - 2.67} \\ \\ \rm \longrightarrow t = 2.6 \: s[/tex]

[tex] \therefore [/tex] Time taken (t) = 2.6 s

Answer:

Answer is A

Explanation:

GOT IT RIGHT ON A P E X :)

The reason for the apparent motions of the sun and other stars across the night sky is the rotation of earth. Hence, option (A) is correct.

The rotation of the planet Earth around its own axis and variations in the orientation of the rotation axis in space are referred to as Earth's rotation or Earth's spin. Earth rotates prograde in an easterly direction. Earth rotates against the direction of the northern polar star Polaris.

The Northern Hemisphere's North Pole, sometimes referred to as the Geographic North Pole or Terrestrial North Pole, is where the Earth's axis of rotation and surface meet. The North Magnetic Pole of the Earth is distinct from this place. The other location where the axis of rotation of Earth crosses the surface is the South Pole, which is located in Antarctica.

The reason for the apparent motions of the sun and other stars across the night sky is the rotation of earth. Hence, option (A) is correct.

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Answer:

the sum of an object kinetic and potential energy

Answer:

B1 and A2

Explanation:

the first one would be B because put 4 into mass times it by the velocity divide it by half because of the radius so the ending result would be 4

number 2 would be  A because just input the numbers by the mass, velocity etc.) then any number  that needs to be divided for an example radius would have to divide so you divide to get the answer.

The momentum of the bowling ball at the point where it reaches a speed of 3.6 m/s is 22.3 Kg.m/s (Option C)

Momentum is defined as the product of mass and velocity. It is represented mathematically as:

Momentum = mass × velocity

Now, we can obtain the momentum of the bowling ball at the point where it reaches a speed of 3.6 m/s. Details below:

Momentum = mass × velocity

Momentum =  6.2 × 3.6

Momentum = 22.3 Kg.m/s

Thus, the momentum at the point is 22.3 Kg.m/s (Option C)

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Answer:

B Raise the object farther off the ground

Answer:

True

Explanation:

There are two major pure substances in Chemistry namely: elements and compounds. Elements are substances made up of only one type of atom which cannot be broken down. For example, H2 symbolizing hydrogen gas is an element.

On the other hand, atoms of different elements can combine together and be held by chemical bonds to form substances called COMPOUNDS. Hence, a compound is pure substance made of more than one type of element bound together in fixed ratios. For example, Al2O3 is a compound comprising of elements Al (aluminum) and O (oxygen) in a fixed ratio of 2:3.

Answer:

The reason is because a heat pump uses external power to accomplish the work of transferring energy from the heat source to the heat sink. Heat pumps are significantly more energy efficient than simple electrical resistance heaters. The efficiency begins to decrease as the temperature difference between the heat source and sink increases.

Answer:

Explanation:

How would this number be expressed in scientific notation? 1.898^27 kg. ...

Answer:

C

Explanation:

you cannot any other thing if you don't even know what you are designing.

The first step in the technological design process is to define a need or problem, therefore the correct answer is option C.

There are mainly five stages of technological design,

Identifying the issue that needs to be solved is the first step in every problem-solving process.

The second stage is to imagine; during this phase,

The chosen product from the imaging stage is planned in the third stage.

Testing, evaluating, and modifying the product are the fourth stage.

The sharing of your solution is the fifth step. To gather comments, discuss your ideas with others, and enhance your product,

Technological designing is a lengthy process that involves a number of steps but identifying the problem we are going to is the most important step among all of the steps because a wrong approach to the problem would lead to faulty design in the later stages.

Thus, the first step in the technological design process is to define a need or problem, therefore the correct answer is option C.

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Answer:

fire

Explanation:

The combustion of propane (C3H8) formed the products of carbon dioxide and water.

Alkanes are known as saturated straight-chain aliphatic hydrocarbons. They undergo combustion reactions with oxygen. Like other alkanes, Propane exhibits combustion reaction in the same way as other alkanes do.

During combustion reaction, Propane burns in the presence of abundant oxygen to produce water and carbon dioxide. This combustion reaction librates a heat of about 50 MJ/kg.

The equation of the reaction can be shown as:

[tex]\mathbf{C_3H_8 + 5O_2 \to 3CO_2 + 4H_2O}[/tex]

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Hello there,

Answer: The answer to you're question is B.) carrying nutrients to and within cells.

Explanation: Water's extensive capability to dissolve a variety of molecules has earned it the designation of “universal solvent,” and it is this ability that makes water such an invaluable of life sustaining force. On a biological level, water's role as a solvent helps cells transport and use substances like oxygen or nutrients. Catch this, water helps take the toxins out of your body. Water also helps you from getting sick. Plus, the brain is 90% water. So, drink that water..... :3

Answer:

In air the particles are much faster than in the ice water

Explanation:

In ice water it's logically much colder, aso ice is solid, which means the particles can't move freely, otherwise it wouldn't be solid. In the air they can move around freely, because air isn't solid, it's gaseous.

Answer:

This is easy. You subtract the final temperature from the starting temperature to find the difference. So if something starts at 50 degrees Celsius and finishes at 75 degrees C, then the change in temperature is 75 degrees C – 50 degrees C = 25 degrees C. For decreases in temperature, the result is negative.

Answer:

When work is being done, the practie of labor is being performed. When work isn't being completed, this is a sign of procrastination.

Explanation:

In the answer.

Answer:

D- energy is being transferred

Explanation:

Answer:

2mg+o2--->2mgo

2moles of mg react with one mole of o2 to form 2 moles of mgo

given 2.5moles of o2 hence 5moles of mg will react

Answer:

unmmmmmmmm I think the answerA

Answer:

c

Explanation:

Answer:

m per second is the answaegnzxn