Studies show that chlorofluorocarbons (CFCs) such as CFC-12, are contributing to the depletion of the
stratospheric ozone layer.
A) True
B) False

Answers

Answer 1
True .the chlorofluorocarbons also known as CFC’s also contribute on depleting the ozone layer
Answer 2

Answer:

true

Explanation:

True .the chlorofluorocarbons also known as CFC’s also contribute on depleting the ozone layer


Related Questions

e) What are the major jobs of a nurse?

Answers

Answer:

the major jobs of a nurse are

1.to take care of patients

2.to give medicine to patients in time

3.to help doctors in operation time

3. Which of these tools is typically not used by Automotive Technicians?
A. Oxyfuel Cutting Equipment
B. Diagnostic Computers
C. Defibrillator
D. Test Instruments

Answers

The answer is "Option c", and more explanation can be defined as follows:

Automotive and mechanical service technicians alter their vehicles using oil. Autonomous service technicians and mechanics often referred to as service technicians or services technology experts, inspection, repair, and maintenance of automobiles & commercial vehicles.It contains fundamental rectangles, wrenches, sockets, flips & pinions. Tool to measure torques: As a technician, you will always take things apart and reassemble them. These tools tighten the attachments so that pieces can be reassembled properly. It uses oxyfuel cutters, diagnostic computers, and test instruments.

Therefore, "Option C" is correct.

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define architecture and Civil engineering in brief ​

Answers

Explanation:

While architects are responsible for the design and planning of structures ranging from houses and factories to skyscrapers and museums, civil engineers oversee the entire design-to-completion process for buildings, roads, dams, bridges, water systems, and other major works.

If a motor or transformer has a low-frequency hum, what can be done to reduce/ eliminate the noise?

Answers

no because has a power and it still with noise

LIST the differences between softwood and hardwood

Answers

Answer:

Hardwood is usually denser than softwood.

Softwood is cheaper than hardwood.

Hardwood has good fire resistance while softwood has poor fire resistance.

Softwood is lighter than hardwood.

TEST ANSWER

PLS IGNORE

5. If you use pipe in a footing drain, there should be surface clean-out(s) located
O A. right next to the house.
O B. every 50 ft.
O C. every 100 ft
O D. near the discharge point,

Answers

Answer:

b because if u got the sewer and septic system

Student A says hazardous waste can take the form of solid, liquid, or gas. Student B says hazardous waste can only take the form of a solid. Who is correct?



Group of answer choices

Both A and B

Neither A nor B

Student A

Student B

Answers

Answer:

Student A

Explanation:

hope this helps have a great day

the need of families and suitability for the local____ have contributed to the structural styles of homes

Answers

Answer:

environment

Explanation:

the environment has different resources

Solve the inequality. Then graph your solution.
-9v – 10 < 7y +6

Answers

16

if you add 9+10 you get 18 - 7+6

TEST ANSWER

PLS IGNORE

Which of the following does the electrical technician typically use?​

Answers

Answer:

What are the choices?

lu
22. The word biodegradable on a label doesn't necessarily mean a product is environmentally safe.
A) O True
B) O False

Answers

That would be A( O True

What is the weight of a steel plate in the shape of a circle with a diameter of 10'? The steel weighs 14 Ib per Ft2

Answers

Width * Length * Thickness * Density = Weight.
48″ * 96″ * . 1875″ * 0.284 lb/in3 = 245 lb.

Explain how metal is produced and turned into a product e.g. bed

Answers

Answer:

the metal is mined from mines and melted to make objects

A tensile load of 5 kN was loaded on a 25 cm circular metal rod of diameter 1 cm,
causing an extension to be 0.0227 cm. Determine the value of Young’s modulus, E,
of the metal.

Answers

Answer:

70 GPa my guyyyy

Explanation:

What efc number will enable a student to receive the full amount of a pall grant

Answers

[tex]\tt \ huge \orange{ oh }[/tex]

The ratio of boys to girls in the class was 2 to 3. If there were 18 girls in the class, how many students were in the class

Answers

37 students in the class
18 Girls and 19 Boys

What is the equation for area

Answers

Answer:

l×b is the equation of area

list the three major factors that the study of architecture includes.

Answers

I think it is

Sensitivity to design
skill in drawing techniques
and the knowledge of the latest construction materials
If I am correct

Which of these does OSHA require employers to construct and install to minimize electrocution hazards?

Answers

Answer:

OSHA requires that the exposed and operating elements of an electrical installation, lighting, equipment, motors, machines, appliances, switches, controls, and enclosures must be constructed and installed so as to minimize workplace electrocution hazards.

Ayuda porfavor......

Answers

Answer:

yayayyayaaayaaaayyayayayayaayaaayayayayayayya

Oh no this is a hard question

during a load test, a battery's voltage drops below a specific value. what action should the technician take?

A. Recharge and retest.
B. Allow battery to become fully discharged and retest.
C. immediately replace
D. None if above

Answers

Answer:

B

Explanation:

allow battery to become fully discharged and retest

When fully charged, a normal 12-volt automotive battery will have about 12.6 volts. The voltage just needs to fall to about 10.5 volts to be deemed fully discharged. The battery will suffer harm owing to severe sulfation if it falls below that level. Thus, option B is correct.

What battery's voltage drops below a specific value?

Changes in Voltage Occur During Discharge, The voltage of each cell is approximately 2.5 to 2.7 volts before the charging circuit is opened at the conclusion of a charge. The voltage of the cell rapidly reduces to roughly 2.1 volts within three or four minutes of the charging circuit being opened.

The voltage across the battery terminals decreases if a load is connected across the battery. The battery's internal resistance is to blame for this voltage drop. By measuring the open-circuit voltage and the voltage across the battery's terminals when a load is connected, we can determine the internal resistance.

Therefore, allow battery to become fully discharged and retest should the technician take.

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2
Tech A says the Wengine consists of two VR cylinder banks in a
deeper V arrangement to each other. Tech B says rotary engines are
very powerful for their size, but they do not use conventional pistons
that slide back and forth inside a straight cylinder. Who is correct?
of

Answers

Answer:tech A

Explanation:

Which event is an example of science helping engineering?
A. Knowledge of local geology helps in the design of a dam for a
reservoir.
B. A new type of telescope helps people learn new facts about
comets.
C. A new type of computer makes weather forecasts more accurate.
D. Satellite imaging allows people to map the extent of forest fires.

Answers

A, because the Geology is helping the engineers design a dam.

An event that is an example of science helping to engineer is  Knowledge of local geology helps in the design of a dam for a reservoir. Thus the correct option is A.

What is Science?

Science is the systematic, evidence-based scientific investigation and implementation of knowledge and perception of the natural and social world which provides information about various things to an individual.

Combining math and science to tackle issues usually defines the functions of engineering.  Engineers are the ones who translate advances in science into practical applications. 

The individual who studies Science is referred to as a Scientist whereas those studies about engineering are referred to as Engineers.

When the design of a dam for a reservoir is created Science helps engineering by providing information and knowledge about Local Geology to help them.

Therefore, option A is appropriate.

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Technician A says that to remove the rod caps on an engine, start by positioning the number 3 piston at top dead center. Technician B says that to remove the rod caps on an engine, start by positioning the number 1 piston at bottom dead center. Who is correct

Answers

Answer:

B.

Explanation:

Removing the rod caps on an engine, start by positioning the number 1 piston at bottom dead center is the correct way to remove them.

Apollo 13 Describe how the flight controllers developed and used models. What kind of drawings might they have used to solve the problem

Answers

Answer:

In order to power the fuel cells that provided most of the electricity used during the flight, the Apollo spacecraft carried two tanks of liquid hydrogen and two tanks of liquid oxygen. ... The testing team decided to solve this problem by heating the tank overnight to force the liquid oxygen to burn off

What is equation for surface area?

Answers

Answer:

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. pls mark me branilest

A series RLC circuit consists of a 100 W resistor, a 0.15 H inductor, and a 30 µF capacitor. It is attached to a 120 V/60 Hz power line (the voltage 120V is the root mean square value). What are



a. The emf εrms


b. The phase angle ϕ


c. The average power loss

Answers

B……………………………………………..

(a) The root mean square value of current in the circuit is 1.14 A.

(b) The phase angle ϕ of the circuit is 17.7⁰.

(c) The average power loss in the circuit is 136.4 W.

Capacitive and inductive reactance of the RLC circuit

The capacitive and inductive reactance of the series RLC circuit is calculated as follows;

Xc = 1/ωC

[tex]X_c = \frac{1}{2\pi f C} = \frac{1}{2\pi (60)(30 \times 10^{-6})} = 88.42 \ ohms[/tex]

Xl = ωL

Xl = 2πfL

Xl = 2π(60)(0.15)

Xl = 56.55 ohms

Impedance of the circuit

The impedance of the circuit is calculated as follows;

[tex]Z = \sqrt{R^2 + (X_c - X_l)^2} \\\\Z = \sqrt{100^2 + (88.42 -56.55)^2} \\\\Z = 104.96 \ ohms[/tex]

Rms current of the circuit

[tex]I_{rms} Z = V_{rms}\\\\I_{rms} = \frac{V_{rms}}{Z} \\\\I_{rms}= \frac{120}{104.96} \\\\I_{rms}= 1.14 \ A[/tex]

Phase angle

The phase angle of the circuit is calcuated as follows;

[tex]tan \phi = \frac{X_c - X_l}{R} \\\\tan\phi = \frac{88.42 - 56.55}{100} \\\\tan\phi = 0.3187\\\\\phi = tan^{-1}(0.3187) \\\\\phi = 17.7 \ ^0[/tex]

Average power loss in the circuit

The average power loss in the circuit is calculated as follows;

[tex]P = I_{rms}^2 Z\\\\P = (1.14)^2 (104.96)\\\\P = 136.4 \ W[/tex]

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Employees are working within an excavation that is more than 4 foot deep and cannot safely exit the site. What is a hazard that needs to be addressed in this situation?
Select the best option.

Access/Egress


Oxygen Deficiency and Toxic Fumes


Water Accumulation

Answers

The answer is Access/egress because the victim can get oxygen from the top and water from the other workers.

A hazard that needs to be addressed in the given situation is Access/Egress. Option A is correct.

What is the significance of Access and Egress?

When handling a security or emergency scenario, access and egress points are crucial. It is crucial to have rapid access to and exit from the building in case of an emergency.

Planning entrance and egress locations should be done while creating evacuation routes. A safe escape that people can use in an emergency is called emergency egress. In an emergency circumstance like a fire, emergency access and escape are crucial.

In the given case, Employees are working within an excavation that is more than 4 foot deep and cannot safely exit the site, this is clearly deined that the Access/Egress is a hazard that must be dealt.

Therefore, option A is correct.

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Evaluate this design by describing the criteria it does or
does not meet

Answers

Answer:

Personal water filters solve the problem of having access to safe drinking water anywhere. They are available and affordable. The materials used to make them are durable. They protect, rather than harm, users. Overall, the benefits outweigh the risks.

Explanation:

i just know its right because its the sample response :D

The personal water filter meets the following requirements: It cleans tap water for domestic use, is reasonably priced, and is easy to transport.

What is water filter?

A water filter reduces water contamination through the use of a thin physical barrier, a chemical reaction, or a biological reaction to remove contaminants.

Conditions were satisfied in the example scenario:

Functionality: The personal water filter is capable of effectively removing germs and other pollutants from water.The filter is portable and convenient to use while traveling or camping because it is small and light.Affordability: The filter is a reasonable solution for those on a tight budget, costing around $20 or so.Durability: The filter can resist the wear and tear of continuous use thanks to its durable plastic design.

Unmet requirements:

Heavy Metal Removal: In locations where water sources are tainted with such substances, the filter's inability to remove heavy metals from water raises some questions.In locations where water supplies are contaminated with these bacteria, the filter's ineffectiveness at removing viruses may be a problem.In regions where only saltwater is accessible, the filter's inability to remove salt from the water could be a problem.Longevity: The filter is sturdy, however depending on usage, it might not last as long as other filtering systems and might need to be changed rather frequently.

Thus, these are the criteria it does or does not meet.

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what are the materials and tools used to build a headgear?​

Answers

Modern headframes are built out of steel, concrete or a combination of both. Timber headframes are no longer used in industrialized countries, but are still used in developing nations.

Pls give me a brainliest if this helped thx
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(3) Ree's hair was shoulder-length and full withungovernable loose curls from temples to neck and snow bits gathered in the tangle (4) Her overcoat wasan implacable black and had been Mamaw's, grim old wool battered by decades of howling winter andsummer moths (5) The buttonless coat fell past her knees, below her dress, but draped open and did nothamper her chopping strokes (6) Her swings were practiced and powerful, short potent whacks (7)Splinters flow, wood split, the pile grew (8) Ree's nose ran and the blood came up in her face and madepink on her cheeks (9) She pinched two fingers high on her nose, snorted a splat to the ground, dragged asleeve across her face, swung the ax again(10) Once the pile of splits became big enough to sit on, she did (11) She sat with her long logs closebeneath hor, booted feet spread wido, pulled headphones from a pocket and clamped them over her ears,then turned on The Sounds of Tranquil Shores (12) While frosty bits gathered in her hair and on hershoulders she raised the volume of those ocean sounds (13) Ree needed often to inject herself withpleasant sounds, stab those sounds past the constant screeching, squalling hubbub rogular life raisedinside her spint, poke the soothing sounds past that racket and down deep where her tonng soul pacedon a stone slab in a gray room, agitated and endlessly provoked butbring a moment's rest. (14) The tapes had been given to Mom whout yearning to hear something that mightsounds and did not care to confront these, but Roe tried them and felt something unknot (15) She alsofavored The Sounds of Tranquil Streams, The Sounds of Tropical Down, and Alpine Dusk(16) As the frosty bits dwindled the wind slowed and big snowflakes began falling as serenely as anythingcould fall the distance from the sky (17) Roe listened to lapping waves of far shores while snowflakesgathered on her (18) She sat unmoving and let snow etch her outline in deepening clean whitenessFrom Dar Woodret Winter Bone 2005 by De WoodQuestionThe description in the first paragraph (sentences 1-9) suggests that Ree isO attentive and fragileO angry and dissatisfiedtough and capablesombor and hopeless