What is a good way to study

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Answer 1

Answer:

Answer:

focus in class and take your time on work and get good grades

Explanation:you can do better when you understand what you are doing/learning

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A vase with a mass of 0.800 kilograms falls from a height of 0.750 meters to a position of 0.500 meters above the floor. Ignoring frictional effects, the kinetic energy at the 0.500 position is _____.

Answers

Answer:

The kinetic energy at the 0.500 position is 1.96 J.

Explanation:

Mass of the vase = 0.800 kg

Height from where vase fallen = 0.750 m

Potential energy of vase at 0.750 m:

$P.E=mgh=0.800 kg* 9.8 m/s^2 * 0.750 m=5.88 Joules$

Kinetic energy of the vase at the point just before it was about to fell:

$K.E=0 J$ (absence of motion)

P.E + K.E = 5.88 J + 0 J = 5.88 Joules

Potential energy of vase at 0.500 m:P.E'

$P.E=mgh=0.800 kg* 9.8 m/s^2 * 0.500 m=3.92 Joules$

Kinetic energy of the vase at the point 0.500 m above the floor: K.E'

As we know, that sum of P.E and K.E remains constant.;

P.E' + K.E' = 3.92 J + K.E' = 5.88 J

K.E' = 5.88 J - 3.92 J = 1.96 J

The kinetic energy at the 0.500 position is 1.96 J.

Answer: The kinetic energy of vase at 0.500 m position is 1.96 J

Explanation:

Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.

Here, the potential energy of the vase is getting converted into kinetic energy of the vase

So, calculating the potential energy of vase, we use the equation:

P = mgh

where,

m = mass of vase = 0.800 kg

g = acceleration due to gravity = $9.8m/s^2$

h = height of vase = (0.750 - 0.500) m = 0.250 m

Putting values in above equation, we get:

$P=0.800kg* 9.8m/s^2* 0.250m\n\nP=1.96J$

At 0.500 m, the potential energy gets converted to kinetic energy.

Kinetic energy of the vase = 1.96 J

Hence, the kinetic energy of vase at 0.500 m position is 1.96 J

What is the difference between an atom and ion. What makes an ion an ion?

Answers

Answer:

atoms are neutral or they have equal number of proton and electron but ions can be cation(positively charged) or anion(negatively charged) based on the number of electron the atm lose and gain respectively

Final answer:

An atom is the smallest unit of matter, with a neutral charge. An ion, however, is an atom that has either gained or lost electrons, giving it a net positive or negative charge. The difference between an atom and an ion is thus primarily about their charge.

Explanation:

An atom is the fundamental unit of matter made up of protons, neutrons, and electrons. In a neutral atom, the number of electrons (which carry a negative charge) equals the number of protons (which carry a positive charge). This makes the overall charge of an atom neutral.

An ion, on the other hand, is an atom that has gained or lost electrons, thus it has a net charge, as the number of electrons does not equal the number of protons. Positive ions, or cations, form when an atom loses electrons, and negative ions, or anions, form when an atom gains electrons.

For example, the anion of chlorine is chloride, and the anion of sulfur is sulfide. The difference between an atom and an ion, therefore, lies primarily in their charge, stemming from the shift in the balance between their numbers of protons and electrons.

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How does a seal belt help prevent injuries by applying a for

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A seat* belt can help prevent major injuries from car crashes because it can buckle people down safely. If a car crashed into the car and you were in the front seat without a seat belt, you could catapult straight out the window. With a seatbelt on, you will be restrained and fastened to the chair and have some not major injuries.

A seat belt helps to prevent injury in the event of a car crash by reducing the velocity of a body as it experiences a sudden decrease in speed. Due to the body's inertia, which is its 'resistance to a change in speed or direction of travel', a passenger in a vehicle will want to continue travelling forwards once the car has reached a sudden stop. If the vehicle is travelling at 50mph and crashes into a brick wall, instantly reducing its velocity to zero, the passenger will continue moving forwards at 50mph unless there is something in front of them to create a 'stopping force'. This is because the velocities of the car and passenger are independent.. Hope this helps you!(: Good luck.

Should mammoths be re-created and released into the Arctic ecosystem

Answers

it honestly depends weather or not they create them the same way

I'd say no; mammoths have been extinct for s long time, so the ecosystem in which they used to live has definitely undergone immense changes, so they probably wouldn't survive these "new" conditions. But if they did, the problem is that they would be an invasive species, because they have no natural predators since they've gone extinct. Hope this helps (:

What is the [H+] of a solution with a pH of 5.6

Answers

The concentration of the hydrogen dissociated into the solution gives the pH. When the solution has a pH of 5.6 then, the concentration of H⁺ is 2.51 × 10⁻⁶.

What is pH?

The estimation of the acidic and alkalinity of the solution based on the amount of the dissociated hydrogen or the hydronium ions in the solution gives the pH.

It is measured with the help of the pH scale that indicates the range of the acids and bases along with neutral. The formula of the pH includes the negative logarithm of the hydrogen ion concentration. pH is calculated as,

pH = - log [H⁺]

Given,

pH = 5.6

Substituting values above the concentration are calculated as,

pH = - log [H⁺]

5.6 = -log [H⁺]

[H⁺] = 10⁻⁵°⁶ ≈ 0.0000025

= 2.51 × 10⁻⁶

Therefore, the hydrogen concentration in solution with pH 5.6 is equivalent to 2.51 × 10⁻⁶.

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Answer:

Hi there!

The answer to this question is 2.5118X10^-6

Explanation:

The formula to solve this is 10^-pH

Which of the following is not a result when a change to an equilibrium system is applied? (2 points)Increasing the rate of the forward reaction will cause a shift to the left.

Increasing the rate of the reverse reaction will cause a shift to the left.

Decreasing the rate of the forward reaction will cause a shift to the left.

Decreasing the rate of the reverse reaction will cause a shift to the right.

Answers

Answer: Option (2) is the correct answer.

Explanation:

According to LeChatelier principle, any change in the equilibrium of a chemical reaction will result in shifting of equilibrium which is opposing the change.

Therefore, when we increase the rate of the reverse reaction that is, we move towards left side then this will actually cause a shift to the right hand side which is opposing the change.

Thus, we can conclude that increasing the rate of the reverse reaction will cause a shift to the left is not a result when a change to an equilibrium system is applied.

It should be increasing the rate of the forward reaction will cause a shift to the left because the external stress, which is the increase in rate, will cause the reaction to be unbalanced, and to reach equilibrium it needs to shift to the right.

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