you stretch a spring by a distance of 0.3 m. the spring has a spring constant of 440 n/m. when you release the spring, it snaps back. what is the kinetic energy of the springs as it reaches its natural length?

Answers

Answer 1

Answer:

19.8 J

Explanation:

According to the law of conservation of energy, the total mechanical energy of the spring (sum of kinetic energy and elastic potential energy) must be conserved:

[tex]K_i + U_i = K_f + U_f[/tex] (1)

where we have

[tex]K_i[/tex] is the initial kinetic energy of the spring, which is zero because the spring starts from rest (2)

[tex]U_i[/tex] is the elastic potential energy of the spring when it is fully stretched

[tex]K_f[/tex] is the kinetic energy of the spring when it reaches the natural length

[tex]U_f[/tex] is the elastic potential energy of the spring when it reaches its natural length, which is zero because the stretch in this case is zero (3)

[tex]U_i = \frac{1}{2}k(\Delta x_i)^2[/tex]

where

k = 440 N/m is the spring constant

[tex]\Delta x_i = 0.3 m[/tex] is the initial stretching of the spring

Substituting,

[tex]U_i = \frac{1}{2}(440)(0.3)^2=19.8 J[/tex]

And so using eq.(1) and keeping in mind (2) and (3) we find

[tex]K_f= U_i = 19.8 J[/tex]

Related Questions

Is true that the earth's crust is made up of many tectonic plates?

Answers

Yes, it is true. In the 20th century, researchers realized that the Earth's crust is not one piece, but is made up of many huge tectonic plates upon which the continents ride.

What type of radiation can penetrate deepest into exposed materials?

Answers

Gamma radiation has the greatest penetrating power. Gamma Radiation can only be absorbed by a thick lead plate. Gamma will pass through 6 feet for steel-lined concrete and can give a lethal dose in as little as 20 minutes. Gamma rays are the most penetrating, being able to travel through a few meters of lead.

ASAP Which of the following has kinetic energy? a. a rock poised for a fall b. an archer’s bow that is drawn back c. a rolling bowling ball d. a car waiting at a red light

Answers

The answer would be C.

Final answer:

The correct answer is c. a rolling bowling ball.

Explanation:

The correct answer is c. a rolling bowling ball.

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass and velocity of the object. In this case, a rolling bowling ball has kinetic energy because it is moving. The other options do not involve motion and therefore do not have kinetic energy.

For example, a rock poised for a fall has only potential energy, as it does not possess motion. An archer's bow that is drawn back also has potential energy stored in the stretched bowstring, but it does not have kinetic energy until the arrow is released. A car waiting at a red light is stationary and not in motion, so it does not have kinetic energy.

All the colors of visible light can combine to form white light.
a. True
b. False

Answers

Yes, it's true. You can see that it is true when you go outside during a summer rain and see a rainbow. That occurs when the the water acts like a lens and separates the light into its component colors. If you have gotten this far in your studies, the index of refraction through water is different for each color which is the way to explain the different colors of the rainbow.

Why is it inadvisable to make a horseshoe magnet from a flexible material? 1. a flexible material is not easily magnetized. 2. a flexible material is easily loses its magnetism. 3. none of these 4. the poles of the magnet attract each other and will cause the magnet to bend. 5. a flexible material cannot be easily made into a horseshoe shape?

Answers

Different magnetic poles are drawn to one another. The magnet will bend if it is too flexible, possibly allowing the poles to touch and reducing the magnetic field around it.

What horseshoe magnet from a flexible material?

Since a horseshoe magnet's design naturally provides more strength than a bar magnet does, it quickly superseded the bar magnet in use. The magnet's poles are situated closer to one another and in the same plane thanks to the U-shape.

The majority of horseshoes are constructed of steel, though there are a few outliers. Because aluminum horseshoes are lighter and perform better when speed is the primary goal, racehorses typically wear them.

At the magnet's poles are concentrated its strongest elements. Because of this, a horseshoe shape is thought to be the strongest.

Therefore, particularly handy to produce if you need to carry heavy goods or strengthen a bar magnet.

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Noah modeled a layer of the sun by showing how particles of rice move up and down in boiling water. Which layer of the sun did Noah model? Convective zone Inner core Photosphere Radiative zone

Answers

The layer would be the CONVECTIVE ZONE. The convective zone is named as such because of that is the layer where convection occurs. Convection is the type of heat transfer where heat goes up and circles back down to be heated as seen with a pot of boiling water with rice.

The rice heats up, along with the water and it goes up. When it touches the cold air, it cools down and travels back down, which will be heated again.

Answer:

The answer is A. Convection Zone

Hope This Helps!

What was the weight, range, and cruising speed of “the big e?

Answers

The weight : 21,000 tons standard 32,060 tons full load
The Range : 12,500 nautical miles
Cruising Speed : 15 knots
USS Enterprise (CV-6) was the seventh U.S. Navy vessel to bear the name. Nicknamed "the Big E", she was the sixth aircraft carrier of the United States Navy.
.

Answer:

Weight = 94,780 tons

Range = 12,500 nautical miles

Cruising speed = 62.2 km/h

Explanation:

Big E was nickname of USS Enterprise CVA(N) - 65 aircraft carrier. It is a nuclear -powered air craft and eighth United States Naval vessel.

Which of the following helps explain why the planets remain in motion around the sun?

A. density
B. gravity
C. inertia
D. both gravity and inertia

Answers

Um I think it is D both gravity and inertia. Hope this helped

D is the answer hope helps

What is the speed of sound in air at 40°C? 355 m/s 307 m/s 331 m/s 239 m/s

Answers

The ans is A. 355 m/s as temperature is above stp

Speed of sound is dependent on air temperature n goes up as it gets warm.

At 40°C, it is 355 m/s

Mosses are located in which zone of deciduous forests?

a. tree stratum

b. ground

c. shrub

d. herb

Answers

Its B- Ground, just took the test

Answer;

Ground

Explanation;Mosses are located in the ground zone of the deciduous forests.Deciduous forests is a biome that has a soil that is rich and the leaves are dropped from the trees to provide a source of organic matter for the soil.Mosses plants are types of plants which belongs to the bryophyta group of plants. They lack roots and are evergreen plants that grow in a wide range of environments but are commonly found covering the ground, along the stream beds, and also at the bases of the trees in deciduous forests.

Which of these is true for the two poles of a magnet?
Question 1 options:

Like poles repel each other.

Unlike poles attract each other.

Like poles attract each other.Unlike poles attract each other.

Like poles attract each other.Unlike poles repel each other.

Like poles repel each other. Unlike poles repel each other.

Question 2 (1 point)
If you rubbed two balloons with a wool cloth and held them close together, what do you think would happen?
Question 2 options:

They would repel one another because they would have positive charges.

They would repel one another because they would both have a negative charge.

They would attract one another because they would both have a negative charge.

They would attract one another because they would have opposite charges.

Question 3 (1 point)
An object has

Answers

1. is A and B
Not sure about the other one

Question 1:

Answer:

Like poles repel each other. Unlike poles attract each other.

Explanation:

In a magnet their are two poles which are north pole and south pole. Like pole repel each other and unlike pole attracts each other because magnetic lines of force originate from north pole and terminate on the south pole.

Question 2:

Answer:

They would repel one another because they would both have a negative charge.

Explanation:

When balloon is rubbed with wool cloth electrons are transferred from wool to balloon. Thus, balloon acquire negative charge and wool becomes positively charged. Since, we are rubbing both balloons the charges on the surface are same. Hence they would repel one another because they would both have a negative charge.

Question 3:

This question is incompletely posted.

If a television with mass 15kg is lifted to a shelf of height 1.2m how much gravitationallyl potential energy is added to the television

Answers

Its potential energy is 176.4J.

(Psychology).

Learning to listen and speak to other people can be considered part of the _____ and the _____ dimensions of development.

A. moral; physical

B. cognitive; physical

C. moral; psychosocial

D. cognitive; psychosocial

Answers

The answers on the blanks in the statement Learning to listen and speak to other people can be considered part of the _____ and the _____ dimensions of development.
Would be D. cognitive; psychosocial. Listening would be a good aspect on the cognitive part of the mind and if you will learn how to speak to others, it will develop a psychosocial aspevt of your personality.

Learning to listen and speak to other people can be considered part of the C. moral and the psychosocial dimensions of development.

In the context of development, the moral dimension refers to the development of personal values, standards, and an understanding of right and wrong. This dimension is crucial for social interactions and understanding the perspectives and feelings of others, which is essential for effective communication. The psychosocial dimension of development involves the growth of one's personality, social skills, and the ability to form relationships with others. It encompasses the process of learning to listen and speak to other people, as these are fundamental social skills that enable individuals to interact and communicate effectively within their social environment.

*PLEASE HELP WILL GIVE BRAINLIEST*

1. What is the period of a wave with a wave speed of 12 m/s and a frequency of 60 Hz?

A. 5.0 s

B. 720 s

C. 0.20 s

D. 0.02 s

Answers

Period = 1/Frequency = 1/60
12 * 1/60 = 1/5 m

So your answer would be C. As 1/5 is .20 seconds.

Answer: 0.02s

Explanation:

A current of 1.8 A delivers 2.5 C of charge. How much time was required?
A.0.70 S
B.0.72 S
C.1.4 S
D..5 S

Answers

The current is defined as the amount of charge that flows through a given point in a certain time interval:
[tex]I= \frac{Q}{\Delta t} [/tex]
where Q is the charge and [tex]\Delta t[/tex] the time interval.

In our problem, I=1.8 A and Q=2.5 C, therefore we can find the time interval by re-arranging the previous formula and plugging these numbers into it:
[tex]\Delta t= \frac{Q}{I}= \frac{2.5 C}{1.8 A}=1.4 s [/tex]

Therefore, C) is the correct answer.

Answer: C

Explanation:

During the early 1800s, these professionals regularly appeared in court to answer questions related to physical evidence.

chemistry

forensic science

legal

medical

Answers

Final answer:

In the early 1800s, forensic scientists, such as chemists and medical doctors, began to provide evidence in court related to physical evidence from crime scenes. Option b

Explanation:

During the early 1800s, forensic science was a field where professionals, including medical doctors and sometimes chemists, provided scientific evidence in courts to assist legal proceedings.

These individuals would analyze physical evidence from crime scenes, such as hair, blood, and other body fluids, and increasingly, DNA. They played crucial roles in determining the facts of criminal cases by examining forensic evidence left at crime scenes.

This period marked the beginning of the systematic application of science to legal processes, a practice that would grow significantly with advancements in technology and methodology. Option b

One hypothesis states that plate movement results from convection currents in the a. inner core. c. lithosphere. b. asthenosphere. d. outer core.

Answers

One hypothesis states that plate movement results from convection currents in the asthenosphere.

8. A thin slice of silicon that contains many solid-state components is a(n)
A) Transistor
B) Intergratef circuit
C) Diode
D) Cathode-ray tube

9. A current of 6.0 amps passed through a motor that has a resistance of 5.0 ohms. Clacukate the power
A) 30 watts
B) 150 watts
C) 180 watts
D) 900 watts

If you have the answers to the Electricity and Magnetism Unit Test I'd really appreciate all of them, I have less than an hour to finish this, yikes.

Answers

Final answer:

Answer to Question 8 is B) Integrated circuit. Answer to Question 9 is C) 180 watts, calculated using the power formula P = IV where I is current and V is voltage determined by Ohm's law.

Explanation:

Solution for Question 8:

A thin slice of silicon that contains many solid-state components and is referred to in the question is known as a(n) Integrated Circuit (IC). This is because an integrated circuit consists of numerous semiconductor devices like transistors, diodes, and resistors that are fabricated onto a single piece of semiconductor material, typically silicon. Therefore, the correct answer is B) Integrated circuit.

Solution for Question 9:

To calculate the power consumed by a motor when a current of 6.0 amps passes through it and it has a resistance of 5.0 ohms, we use the formula for electrical power, P = IV (Power = Current × Voltage). Since we know the current (I) and the resistance (R), we first need to find the voltage (V) using Ohm's law, V = IR (Voltage = Current × Resistance). Plugging in the values, we get V = 6.0 A × 5.0 Ω = 30.0 V. Now we can calculate the power, P = 6.0 A × 30.0 V = 180 watts. Thus, the correct answer is C) 180 watts.

Windmills generate electricity by transferring energy from wind to a turbine

Answers

The complete question is reported in the attached picture.

1) The regression analysis was performed by the computer, in the output we have the coefficients we need: 0.137 and 0.240.
Therefore the equation of the least squares regression line will be:
[tex]\hat{y} = 0.137 + 0.240x[/tex]

where:
[tex]\hat{y}[/tex] = estimate of electricity production [A]
x = wind speed [mph]

2) Let's apply the previous formula to our cases:
x = 25 --> [tex]\hat{y}[/tex] = 0.137 + 0.240(25) = 6.137 A
x = 15 --> [tex]\hat{y}[/tex] = 0.137 + 0.240(15) = 3.737 A

The difference is 6.137 - 3.737 = 2.4 A

The windmill would be expected to produce 2.4 A more when the wind speeds at 25mph with respect to when the wind speeds at 15 mph.

3) The proportion of variation in electricity production explained by the linear relationship with the wind speed is given by the R-Sq value, which is 0.873.

Hence, the linear relationship between electricity production and wind speed explains the 87.3% of the variation in production.

4) The text says that the assumptions were checked. The computer performed all the calculations, finding as t-score for wind speed:
T = Coef / SE Coef = 0.240 / 0.019 = 12.63
which was converted to a p-value:
P = 0.000

Therefore, being p <0.05, the null hypothesis can be rejected and we can say that electricity production by the windmill is related to wind velocity.

How much heat is required to warm 1.40 l of water from 20.0 ∘c to 100.0 ∘c? (assume a density of 1.0g/ml for the water.)?

Answers

The water density is
[tex]d=1.0 g/mL = 1000 g/L[/tex]
And the mass of 1.40 L of water is
[tex]m=dV=(1000 g/L)(1.40 L)=1400 g[/tex]

The amount of heat needed to increase the temperature of the water by [tex]\Delta T[/tex] is given by
[tex]Q=m C_s \Delta T[/tex]
where m is the water mass, [tex]C_s = 4.18 J/g ^{\circ}C[/tex] is the water specific heat capacity and
[tex]\Delta T=100.0 ^{\circ}C-20.0 ^{\circ}C = 80.0^{\circ}C[/tex]
is the increase in temperature. If we substitute these numbers into the equation, we find
[tex]Q=(1400 g)(4.18 J/g^{\circ}C)(80.0^{\circ}C)=4.68 \cdot 10^5 J[/tex]

Final answer:

The amount of heat required to warm the water can be calculated using the formula Q = mcΔT, where Q is the heat energy, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature. Therefore, the amount of heat required to warm 1.40 L of water from 20.0 °C to 100.0 °C is 468,352 J.

Explanation:

The amount of heat required to warm the water can be calculated using the formula:

Q = mcΔT

Where Q is the heat energy, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature.

Given that the density of water is 1.0 g/mL and the volume of water is 1.40 L, the mass of water can be calculated as:

m = density × volume = 1.0 g/mL × 1.40 L × 1000 mL/L = 1400 g

The change in temperature is 100.0 °C - 20.0 °C = 80.0 °C.

Substituting the values into the formula:

Q = (1400 g)(4.184 J/g °C)(80.0 °C) = 468,352 J.

Therefore, the amount of heat required to warm 1.40 L of water from 20.0 °C to 100.0 °C is 468,352 J.

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Read each scenario and then answer the questions. Scenario A: A shopping cart is pushed a distance of 3 m by a force of 15 N. Scenario B: A shopping cart is pushed a distance of 4 m by a force of 12 N. Scenario C: A shopping cart is pushed a distance of 6 m by a force of 10 N. Which scenario requires the most work? Which scenario requires the least work?

Answers are C and A

Answers

To solve this we are going to use the formula for work: [tex]W=Fd[/tex]
where
[tex]W[/tex] is the work done
[tex]F[/tex] is the force
[tex]d[/tex] is the distance

Scenario A. We know for our problem that [tex]F=15N[/tex] and [tex]d=3m[/tex]. Lets replace those values in our formula to find [tex]W[/tex]:
[tex]W=15N*3m[/tex]
[tex]W=45J[/tex]

Scenario B. We know for our problem that [tex]F=12N[/tex] and [tex]d=4[/tex]. Lest replace those value in our formula:
[tex]W=12N*4m[/tex]
[tex]W=48J[/tex]

Scenario C. We know for our problem that [tex]F=10N[/tex] and [tex]d=6m[/tex]. Lets replace the values in our formula:
[tex]F=10N*6m[/tex]
[tex]F=60J[/tex]

We can conclude that:
- The scenario that requires the most work is C.
- The scenario that requires the least work is A.

Answer:

Read each scenario and then answer the questions.

Scenario A: A shopping cart is pushed a distance of 3 m by a force of 15 N.

Scenario B: A shopping cart is pushed a distance of 4 m by a force of 12 N.

Scenario C: A shopping cart is pushed a distance of 6 m by a force of 10 N

Which scenario requires the most work?

Answer: Scenario C

Which scenario requires the least work?

Answer: Scenario A

An airplane flies 930 miles in 75 minutes. how many miles does it fly in 5 hours and 45 minutes assuming a constant speed?

Answers

Let's convert the second time into minutes. 5 hours corresponds to
[tex]5 h \cdot 60 m/h =300 m[/tex]
So the second time is
[tex]t_2 = 5 h 45 m = 300 m + 45 m = 345 m[/tex]

We can now solve the problem by using a simple proportion. We know that the plane takes 75 minutes to fly 930 miles, so the distance covered in 345 minutes is given by
[tex]930 miles : 75 min = x : 345 min[/tex]
[tex]x= \frac{930 miles \cdot 345 min}{75 min} =4278 miles [/tex]

Final answer:

First, calculate the average speed of the airplane, which is 12.4 miles per minute. Then, convert 5 hours and 45 minutes into minutes which is 345 minutes. Multiple the speed by this time to find the distance the airplane would fly, which is 4278 miles.

Explanation:

To solve this problem, we first need to figure out the average speed of the airplane. Average speed is calculated by dividing the total distance by total time. In this case, the airplane travels 930 miles in 75 minutes. So the speed is 930 miles/75 minutes = 12.4 miles/minute.

Now that we have the speed per minute, we can calculate how many miles the airplane would travel in 5 hours and 45 minutes. This time converts to 345 minutes (since 1 hour = 60 minutes). So, the airplane would fly 12.4 miles/minute * 345 minutes = 4278 miles.

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On a 600-mile, a pilot can save 30 minutes by increasing her usual speed by 40 mph. find her usual speed

Answers

217.1 mph that is his usual speed

Can anyone please help me with answering this question? : An accelerating (speeding up) body has a Net Force acting in the direction of motion. True or False? Why?

Answers

That's true.

Netwon's second law states that the resultant of the forces F acting on a body is equal to the product between its mass m and its acceleration a:
[tex]\sum F = ma[/tex]
This means that if the net force acting on an object is different from zero (term on the left), than the acceleration of the object (term on the right) must be different from zero as well, and therefore the body is accelerating.

In particular, both F and a in the equation are vectors: this means that if the acceleration is positive, F and a have the same direction. In this problem, the acceleration is positive (because the object is speeding up), therefore the force and the acceleration have same direction.

what do waves transmit?

Answers

Waves transmit energy

Answer:

Waves only transport a portion of energy.

Explanation:

Let's think about some examples related to waves in nature:

An electromagnetic wave is a combination of electric and magnetic fields, both of them oscillate through space and time. That oscillation transport energy, that is bounded in little "packets" of energy called photons. So this wave transmits energy.In the case of a solid, the periodic oscillation of the molecules, this kind of oscillation transport energy too and in this particular case it is called phonons. It is just a quantum of energy related to a compression wave, as a sound or a vibration lattice in a crystal.

In conclusion, waves only transport a portion of energy.

I hope it helps you!

In situations where the plane of projection is not parallel to the surface of the object, the resulting orthographic view is ____.

Answers

The resulting orthographic view is foreshortened.

Which of the following are disadvantages of solar energy?

Answers

Final answer:

The disadvantages of solar energy primarily include its dependency on weather, need for large space, requirement of rare-earth minerals for photovoltaic cells, and potentially high costs.

Explanation:

The main disadvantages of solar energy are largely tied to its dependence on weather conditions and the requirement of considerable space. Solar energy generation is chiefly affected by cloud cover, nightfall, and incident angle strike at high altitudes that influence the amount of light energy available. While solar energy conversion does not necessarily require connection to large-scale power grids, making it beneficial for remote locations, it does rely on the creation of photovoltaic cells which require rare-earth minerals that can be difficult to obtain. Additionally, the price of solar energy, despite falling dramatically, may still present as a financial barrier for some.

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For the Doppler effect to occur ?

Answers

change of pitch that occurs due to a moving sound source

What linear speed must an earth satellite have to be in a circular orbit at an altitude of 159 km?

Answers

Gravitational acceleration, g = GM/r^2. Additionally, for a satellite in a circular orbit, g = v^2/r

Where, G = Gravitational constant, M = Mass of earth, r = distance from the center of the earth to the satellite, v = linear speed of the satellite.

Equating the two expressions;
v^2/r = GM/r^2
v = Sqrt (GM/r);
But GM = Constant = 398600.5 km^3/sec^2
r = Altitude+Radius of the earth = 159+6371 = 6530 km

Substituting;
v = Sqrt (398600.5/6530) = 7.81 km/sec = 781 m/s

Nanotechnology and microtechnology devices are both very tiny. However, one property of nanotechnology distinguishes it from microtechnology. What is this unique property?

Answers

Nanotechnology deals with atomic, or rather molecular scales, as opposed to micro-technology which deals with mechanical and electrical devices. In addition, nanoscale is one-third of microscale.

The unique property of it is that nanotechnology deals with atomic, or rather molecular scales, as opposed to micro-technology which deals with mechanical and electrical devices. In addition, nanoscale is one-third of microscale. It deals with the very small and tiny particles that our naked eye cannot see.

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Given that f(x) = x2 4x 3 and g(x) = the quantity of x plus three, over four, solve for f(g(x)) when x = 9.6369 If you add 500 kj of heat to 500 g of water at 50.0c, how much water is left in the container? the latent heat of vaporization of water is 2.26 103 j/g and its specific heat is is 4.190 j/(gk) Which of the following shows that Gregor is still partially human inside? Select all that apply. He is captivated by Gretes violin playing. He is moved when his mother speaks to him. He likes to eat the same food he always did. He wants to keep the picture of the lady in his room. Internet-based commerce is called _____ and includes two main sectors: b2c (business-to-consumer) and b2b (business-to-business). John noticed that Steve was fidgeting during their meeting. Because of this, John began to doubt Steven's interest in the information they discussed. What was John picking up on?a. clarificationb. active listeningc. nonverbal communicationd. cultural communication customs Compard with the late ninteent century social darwinist view of the world, voltaires view in the passage is In relation to other options, how liquid is a savings account? What are the main reason president adams was not popular with the democratic republicans? An airplane flies 930 miles in 75 minutes. how many miles does it fly in 5 hours and 45 minutes assuming a constant speed? problems with solar energy include The freedom to exercise judgment in an organization is called _______. The prices (in dollars) of 50 randomly chosen types of shoes at 4 different stores are shown in the box plots. At which store would a person MOST LIKELY pay $18.75 for a pair of shoes?A) Store AB) Store BC) Store CD) Store D did the supreme court belive nixon when he claimed the idea of executive privilege or did the court rule that the executive were not above the rule of law Ethan nedelmann argues that drugs should be legalized because? I need step by step instructions on how to get the y-intercept for the following function:f(x)=x^3-18x^2+107x-210. Why are humans important to the life cycle of malaria parasites? How did the Portuguese influence Chinese trade during the 15th and 16th centuries? the points shown on thw graph represent the numbers in a geometric sequence. what is the initial value? The mean of a set of five numbers is 4.8. Given that the sixth number is x and the mean of these six numbers is 5.5, find the value of x. Andy, who is part of fritz's project team, has been making a mistake repeatedly. instead of submitting his work to fritz for review, as the project guidelines instruct him to do, he has been submitting his work directly to the client when he finishes working on it. this has been creating extra work for fritz. fritz finally says to andy, "i noticed that we've been submitting some work directly to the client before it has been reviewed internally by me. what i would prefer is for you submit your work to me first so that i can help ensure that all our deliverables are consistent."