1 point
30. A ray passing through the centre of curvature of a concave mirror.
after reflection is reflected back along the same path. Which is the correct
figure for the above statement.

Answer:

a. [tex]a=1.875\,ms^{-2}[/tex]

b. [tex]v_{0} =7.5\,ms^{-1}[/tex]

c. [tex]s=60\,m[/tex]

Explanation:

Given,

[tex]u=0\,ms^{-1}\,;[starts\,from\,rest]\\v=15\,ms^{-1}\\t=8\,s[/tex]

a. We know,

∴[tex]v=u+at\\=>15=0+a*8\\a=1.875\,ms^{-2}[/tex]

b. We know,

∴[tex]s=\frac{u+v}{2}*t\\=>s=\frac{0+15}{2}*8\\s=60\,m[/tex]

average velocity,[tex]v_{0} =\frac{s}{t}=\frac{60}{8}=7.5\,ms^{-1}[/tex]

c. From b, the answer is 60 m

hope you have understood this....

pls mark my answer as the brainliest

Answer:

the long wavelength and not focused on the negatives.

Answer:

Valence electrons increase by one

The 'Periodic Table' is characterized as the 'tabular representation of chemical elements as per their atomic number in order to keep the elements possessing similar properties in a single group.'

In case one moves towards right from left in this table except for the transition elements, the trend that occurs would be:

A). Valence electrons increase by one.

Thus, option A is the correct answer.

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Answer:

700 hz

Explanation:

Answer:

Cohesion

Explanation:

Cohesion is the force responsible for holding the molecules of water together.

Adhesion is type of force between two different molecules or compounds.

Surface tension allows water molecules or molecules to resist any external force "due" to cohesive forces.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

We have that the normal force is given as [tex]F_N=4802N[/tex],while the minimum amount of force needed to get the piano to move to be [tex]F_f=1680.7N[/tex] and

Coefficient of kinetic friction as [tex]\mu_k=0.23[/tex]

A)  [tex]F_N=4802N[/tex]

B) [tex]F_f=1680.7N[/tex]

C)  [tex]\mu_k=0.23[/tex]

From the question we are told that:

Mass [tex]m=490kg[/tex]

A)

Generally, the equation for normal force  is mathematically given by

[tex]F_N=mg[/tex]

[tex]F_N=(490kg*9.81)[/tex]

[tex]F_N=4802N[/tex]

B)

From the question we are told that:

Coefficient of static friction [tex]\mu=0.35[/tex]

Generally, the equation for Frictional Force  is mathematically given by

[tex]F_f=\mu mg\\\\F_f=4802*0.35[/tex]

[tex]F_f=1680.7N[/tex]

C)

From the question we are told that:

Horizontal force [tex]F_h =1.1 * 10^2 N[/tex]

Generally, the equation for coefficient of kinetic friction  is mathematically given by

[tex]\mu_k=\frac{F_h}{mg}[/tex]

[tex]\mu_k=\frac{1.1 x 10^2}{4802}[/tex]

[tex]\mu_k=0.23[/tex]

Therefore in conclusion

the normal force is given as [tex]F_N=4802N[/tex],while the minimum amount of force needed to get the piano to move to be [tex]F_f=1680.7N[/tex] and

Coefficient of kinetic friction as [tex]\mu_k=0.23[/tex]

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Answer:

m2·kg·s-2

Explanation:

this is the answ

Explanation:

Move past each other.

Have a good day.

Answer:

What boxes are you talking abt?

The Answer should most likely be A

Explanation:

you see B and C are pretty much the same but A has more weight and more wheels (sorry been a while sense I did this so I am calling the wheel and axel points what they look like to me) with having more wheels and axels and more weight it should have a higher force advantage.

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                         Hope it helps, and have a good day!

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Answer:

your answer is (B) decreasing

I hope it's helps you

Answer:

Marie Curie

Explanation:

I hope to see you helped :D?

Explanation:

a) Distance ➤ (80+50+70+40) m. ➤ Distance= 240m.

b) Displacement ➤ (50+40)m. ➤ Displacement= 90m

c) Average Speed ➤ Total distance travelled/total time taken

                              ➤ 240/48

                              ➤ 5 [tex]ms^{-1}[/tex]

d) Average Velocity ➤ Total displacement/total time taken

                                 ➤ 90/48

                                 ➤ 1.875 [tex]ms^{-1}[/tex]

An irreversible reaction is a reaction that tends to completion. When a strong acid added to water, the reaction is irreversible.

In chemistry, a reaction may be reversible or irreversible. In a reversible reaction, the reaction could move forward or backwards. An irreversible reaction only tends towards completion. It doesn't goes in the reverse direction.

When a weak acid or base is added to water, the reaction is reversible because the substance does not ionize to a large extent in water and the equilibrium position may lie towards the far left. However, a strong acid or base achieves 100% ionization in water hence the reaction is irreversible.

Therefore, when a strong acid added to water, the reaction is irreversible.

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Answer:

1. strong acid added to water

2. The dissociation constant for hydrochloric acid is greater than the dissociation constant for acetic acid.

3. HA, HC, HB

4. decreasing the concentration of OH– ions

HOPE THIS HELPS

Answer:

the answer is a. a ball is moving towards the camera faster then slower

Answer:

dude if any body could answer that they deserve a Nobel prize because the formula to solve that would require the exact measurement of hadar or as commonly known beta centauri

Explanation:

There are several models that outlines the scientific method, which is

based on formulating an hypothesis to answer observed phenomena, and

testing the hypothesis to see if it is correct

The correct option for the explanation for the step between experimenting and conclusion is option D

(D) The need to evaluate the meaning of the experiment's results before

drawing a conclusion

The steps in the scientific method are designed to help solve existing

problems and they include;

The step that comes between experimenting and conclusion is the

analysis of the experimental result to extract the information from the raw

experimental data, so as to evaluate the hypothesis and also the

procedure of the experiment. After the analysis, conclusion is drawn and

reported followed a new hypothesis is formulated or the existing

hypothesis is expanded upon, Therefore, the correct option is option D.

The need to evaluate the meaning of the experiment's results before

drawing a conclusion

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We have that with these disciplines well defined, The Form of accounting that speaks the most Burger Huts situation is the discipline of Management Accounting

Firstly we define the Disciplines of Accounting below

Financial accounting

Financial Accounting, this is a branch of accounting that focuses mainly on the Recording,Encapsulating or Summing up and then Releasing a statement bearing the Affairs of a Business over a specific time frame.

Management Accounting

This Branch of accounting focuses on the use of existing Financial positions to make assessment of a business and determine the best way to move the business forward.

Tax Accounting

This is a branch of accounting that focuses on taxation.This branch is governed by stiff rule that ensure that business stay in check.

Therefore

With these disciplines well defined, The Form of accounting that speaks the most Burger Huts situation is the discipline of Management Accounting

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Answer:

At t = 1.6 sec., the man has jogged 1.76m.

From that point on, the dog closes in on the man at the speed of 3.8 - 1.1 = 2.7m/s.

The time for the dog to catch the man is therefore t = 1.76/2.7 = .65s.

The man will have jogged .717m further for a total distance of 2.477m.

The dog will have traveled .65(3.8) = 2.477m.

Explanation:

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If A man jogs at a speed of 1.5 m/s. His dog waits for 2.5 s and then takes off running at a speed of 2.6 m/s to catch the man, then they have to travel 8.85 meters each when the dog catches up with the man.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

The unit of velocity is meter/second. It can also be represented by the infinitesimal rate of change of displacement with respect to time.

The generally considered unit for velocity is a meter per second.

As given in the problem If A man jogs at a speed of 1.5 m/s. His dog waits for 2.5 s and then takes off running at a speed of 2.6 m/s to catch the man,

When both the man and dog meet the distance covered by them would be equal.

Let us assume the time taken to catch up is t seconds when the dog takes off,

distance covered by man = distance traveled by the dog

1.5 ×t + 1.5×2.5  = 2.6 ×t

1.1t = 3.75

t = 3.75/1.1

 = 3.40 seconds

Distance traveled during the catch-up = 3.40 ×2.6

Distance traveled during the catch-up = 8.85 meters

Thus, they have to travel 8.85 m each when the dog catches up with the man

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#SPJ2

Answer:

F = G M1 M2 / R^2

R^2 = G M1 M2 / F

R^2 = 6.67 E-11 * 6.78 E26 * 5.42 E20 / 8.6 E10

R^2 = 6.67 * 6.78 * 5.42 / 8.6 * E25

R^2 = 28.5 * E25 = 2.85 * E26

R = 1.69 E13 m

The gravitational force F between two bodies of masses M and m, separated by a distance R, has a magnitude of

F = GMm/R ²

We're given that

F₁ = Gm₁m₂/r ²

and

F₂ = G (2m₁) (4m₂)/(2r )²

Now,

F₂ = G (2m₁) (4m₂)/(2r )²

F₂ = 8/4 Gm₁m₂/r ²

F₂ = 2 Gm₁m₂/r ²

F₂ = 2 F₁

so n = 2.

Answer:

heyy

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3

3

5

6

53

5

5

6546

3

4

5

6

6

53

3

4

6

65

4

5

6

5

5

5

6

6

4

4

5

5

5

The four variables that must be controlled for the results of Maria and Elena to be valid are

Variables in an experiment are those values that can change.

When conducting an experiment, there are usually different types of variables that are used and one of such is the Controlled variables.

The Controlled variables are known as those extraneous variables that can affect the results ( dependent variables) of an experiment. Therefore they should be held constant in order to obtain a valid result.

Examples of such controlled variables are Temperature, Amount of light,

Humidity and Time.

Take for instance, If the experiment conducted by Maria and Elena has to do with the rate at which an enzyme acts on different substrates. The temperature of the experiment needs to be constantly maintained to achieve a valid result.

This is because an increased temperature leads to increased rate of reaction between the enzyme and the substrate.

Therefore the variables that must be controlled for Maria and Elena results to be valid are the controlled variables which includes Temperature, Amount of light, Humidity, Time.

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Please find attached photograph for your answer. Please do comment whether it is helpful or not.

Answer:

It took 2 hours

Explanation:

[tex]{ \bf{time = \frac{distance}{speed} }} \\ [/tex]

distance is 90 miles

speed is 45 miles per hour

[tex]t = \frac{90}{45} \\ \\ t = 2 \: h[/tex]

Answer:

2 hours

Explanation:

45 times 2 is 90

Answer:

1 casparian strips are present in the root of endodermis.

2 the endarch condition is the character fature of stem.