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3 years ago

What is responsible for the hole in the ozone layer?

Physics

2 answers:

Vaselesa [24]3 years ago

5 0

CFCs, carbon dioxide, green house gases and it's effects are responsible for the hole in ozone layer.

babymother [125]3 years ago

4 0

Answer: The depletion of the ozone layer is due to CFC (chloro fluoro carbon) which is widely used in air conditioner and refrigeration.

Explanation:

Ozone layer prevents the harmful radiation from entering the earth's surface.

Ultraviolet radiation is very harmful radiation. Exposure of this radiation can cause Skin cancer. It is the main cause of the sunburn.

The depletion of the ozone layer is due to CFC (chloro fluoro carbon) which is widely used in air conditioner and refrigeration.

CFC is broken down by ultraviolet radiation. Then, the chlorine is released. This chlorine reacts with oxygen. In this way, it destroys the ozone molecule.

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A 3.50 kg block is pushed along a horizontal floor by a force of magnitude 15.0 N at an angle θ = 30.0° with the horizontal. The

Crank

Answer :

The frictional force on the block from the floor and the block's acceleration are 10.45 N and 0.73 m/s².

Explanation :

Given that,

Mass of block = 3.50

Angle = 30°

Force = 15.0 N

Coefficient of kinetic friction = 0.250

We need to calculate the frictional force

Using formula of frictional force

$F_{k}=\mu N$

$F_{k}=\mu (F\sin\theta+mg)$

$F_{k}=0.250\times(15\times\sin30^{\circ}+3.50\times9.8)$

$F_{k}=0.250\times41.8$

$F_{k}=10.45\ N$

(II). We need to calculate the block's acceleration

Using newton's second law of motion

$F=ma$

$a=\dfrac{F}{m}$

$a=\dfrac{F\cos\theta-F_{k}}{m}$

$a=\dfrac{15.0\cos30^{\circ}-10.45}{3.50}$

$a=0.73\ m/s^2$

Hence, The frictional force on the block from the floor and the block's acceleration are 10.45 N and 0.73 m/s².

8 0

3 years ago

A type of anchor that is a good choice when jacking or leveling

Anika [276]

A type of anchor that is a good choice when jacking or leveling the fastening component is a stud bolt anchor.

<h3>What is a Stud bolt anchor?</h3>

These are the type of anchor which bare embedded in concrete with the threaded portion on the outside.

This makes it easier to jack or level the fastening component which is why option B was chosen.

Read more about Anchor here brainly.com/question/17187235

#SPJ1

4 0

2 years ago

What property makes ocean water a good conductor of electricity

Lostsunrise [7]

Answer:

The salt molecules (Sodium ions and Chlorine ions) in the ocean water makes it a good conductor of electricity.

Explanation:

Conductivity refers to the ability of an object to transmit electricity. Transmitting electricity means allowing electricity to pass through the material. The best conductor of electricity is "silver." Other elements which are also good conductors are: gold, aluminum, copper, etc. Those which are poor in conducting electricity are called insulators. These include glass, plastic, rubber, paper, styrofoam, etc.

Ocean water is considered a good conductor of electricity because it contains Sodium ions and Chlorine ions. Remember that ions carry electrical charges, which could either be positive or negative. The Sodium ion here is positively charged, while the Chlorine ion is negatively charged. Being mixed with water makes it an electrolyte solution. When electricity travels, it needs to have two sources: a positive terminal and a negative terminal. This means that the Sodium ions will be attracted to the electricity's negative terminal, while the Chlorine ions will be attracted to the positive terminal. This will allow the electrons to flow through the medium, thus creating a circuit for electricity to pass through.

This is the reason why ocean water is a good conductor of electricity.

5 0

3 years ago

What did Thomson’s and Rutherford’s experiments have in common? They both used charged particles in their experiments. They both

Triss [41]

Answer:

Both Thomson and Rutherford used charged particles in their experiments.

Explanation:

6 0

3 years ago

Read 2 more answers

Name the processes of going (a) from a solid to a gas and (b) from a gas to a solid.

marissa [1.9K]

The answer to the first one is sublimation.

8 0

3 years ago