Typically, neither. It has 11 protons and 11 electrons. It has only one electron in its valence (outer) shell however, which makes it highly reactive.

You have heard of Wikipedia, surely.

convection currents in the outer core (which is in liquid form) move the molten metal of the outer core around to create the magnetic field. The magnetic field then blocks certain rays from the sun.

Humans,

Wood.

Ships

Boats

Dogs.

Anything that has a density of less than 1 g/cm^3

Yes because work=friction ×distance

How much force is needed to push a screw/nail into the wood is a function of the size of the surface area of the part of the screw/nail that you are trying to put in. This idea is described in the pressure function which says P=F/A The wood has a certain resistivity to deform but with enough Force (applied with a hammer/screwdriver) over a small enough Area (the bottom of the screw/nail) the Pressure will be enough to drive it through. your mom

Water

The force that the planet Earth applies on an object(the force is also called weight) depends on the mass of the object. It is not constant. The formula is:

Weight = mass x acceleration due to gravity

Acceleration due to gravity has a constant value on Earth: 9.81 m s-2

However, it is not constant everywhere in the universe. It depends on the planet you are on. Mass, however, is constant.

Sodium acetate is composed of sodium ions and acetate ions, forming a compound. It finds frequent application in heating pads or hand warmers. As it transitions from a liquid to a solid state, it undergoes exothermic crystallization, resulting in the release of heat. In essence, it becomes hot when it solidifies. This fascinating phenomenon provides a warming effect.

Gravitational force

A mass traverlling at a given speed/velocity.

Do NOT confuse with 'Force'.

Momentum = mass X veloicty

Force = mass X acceleration.

A car , of say mass 1 tonne, ( 1000 kg) travelling at 44 netres per sec has a momentym of = 1000 kg X 44 m/s = 44000 kg m/s

The same vehicle accelerating from 0m/s ( standing start) to 44 m/s in 10 sec has a force of

F = 1000 kg( 44 - 0 ) m/s / 10 s

F = 1000 kg * 4.4 m/s^2

F = 4400 kg m/s^2

Note the different in the time(s) units.

You walking have kinetic energy

A car/train/ship/aeroplane moving has kinetic energy

A rocket going into space has kinetic energy.

The Earth orbiting around the Sun has kinetic energy.

Any object that is moving has kinetic energy.

K.E. = 0.5 massvelocity^2

or

KE = = 0.5 m v^2

YES!!!

It is a clean source of electrical energy. It is produced by the action of falling water.

However, in some cases a large dam may have to be constructed, and this is environmentally damaging.

However, there is also tidal energy, produced by the action of sea water ebbing and flowing of the tides.

NO!!!

Acceleration is the change in velocity over a give time.

A = ( u - v) / t

e.g.

A cae standing start to 30 mph. in say 10 secs.

First we need to change the units of time and distance .

30 mph = 44 m/s

u = final velocity of 44 m/s

v = initial velocity of 0 m/s ( standing start)

t = 10 secs.

Substitute

a = ( 44 m/s - 0 m/s_ / 10s

a = 44m/r /10s

a = 4.4 m/s^2

Bear in mind gravitational acceleration on Earth is ~ 10m/s^2

What is the unis of stress in cgs system

SENDONG MOVES AROUND NORTHWES

The word 'halogen# vp,es Latin and means 'Salt maker'

'Halo' ; Salt , and 'gen' ; maker or GENerator.

The elements are

Fluorine, Chlorine, Bromine, Iodine, Astatine and Tennessine.

The last two elements are not fully characterised.

yes noob

Number of images will form when two plane mirror are enclimed at an angel of 90

As expressed, three.

The relationship between pressure and temperature depends on the conditions and the substance involved. In general, for ideal gases, pressure and temperature are related by the ideal gas law, which is given by the equation:

�

�

=

�

�

�

,

PV=nRT,

where:

�

P is the pressure,

�

V is the volume,

�

n is the number of moles of gas,

�

R is the ideal gas constant, and

�

T is the temperature in kelvin.

According to the ideal gas law, pressure is directly proportional to temperature when other parameters are held constant. This means that, for an ideal gas, if the temperature increases while other factors remain constant, the pressure will also increase, and vice versa.

However, for real gases and under certain conditions, the relationship between pressure and temperature can be more complex, and deviations from ideal behavior may occur. In some cases, other factors such as intermolecular forces and the nature of the substance can affect the relationship between pressure and temperature. Therefore, it's important to consider the specific conditions and properties of the substance in question.

It moves by the gravitational pull on the Earth's atmosphere.

Momentum = speed multiplied to mass.

M'm = 5 ms^-1 X 20 kg .

M'm = 100 kg m s^-1

Understanding the intricacies of how electric current works in solar panels involves delving into the fascinating process of converting sunlight into usable electrical energy. At the heart of this transformation is the photovoltaic effect, a phenomenon inherent to the solar cells comprising solar panels.

The solar panels predominantly consist of semiconductor materials, typically silicon-based, that exhibit the photovoltaic effect. When sunlight strikes these materials, photons, the particles of light, transfer their energy to electrons within the semiconductor. This energy excites the electrons, enabling them to break free from their atomic orbits.

This liberation of electrons results in the creation of electron-hole pairs within the semiconductor. An electron-hole pair comprises a free electron and the positively charged "hole" left behind when an electron is excited. These electron-hole pairs are pivotal for the generation of electric current.

Due to the presence of an electric field within the solar cell, the liberated electrons are compelled to move in a specific direction, establishing an electric current. This movement of electrons constitutes direct current (DC). The electric field is established during the manufacturing process through the introduction of specific doping materials.

Conductive metal contacts on the top and bottom surfaces of the solar cell facilitate the collection of the generated electric current. The electrons flow through an external circuit, creating an electric current that can be harnessed for various applications.

While solar panels produce DC, most household appliances and the electrical grid operate on alternating current (AC). Therefore, an inverter is typically employed to convert the DC generated by the solar panels into AC, making it compatible with standard electrical systems.

In conclusion, the generation of electric current in solar panels relies on the photovoltaic effect, where sunlight triggers the liberation of electrons, setting in motion a series of processes that culminate in the production of clean and renewable energy.

The functionality of solar panels during rainfall is a common inquiry, considering the impact of weather conditions on solar energy production. Contrary to expectations, solar panels can still generate electricity when it's raining, albeit at a reduced efficiency compared to sunny conditions.

During rainfall, the amount of sunlight reaching the solar panels is diminished due to the cloud cover. However, solar panels don't solely rely on direct sunlight. They can harness diffuse sunlight, which consists of scattered sunlight that penetrates through clouds and rain. While the intensity of this diffuse sunlight is lower than that of direct sunlight, it still enables the solar panels to generate electricity.

The efficiency of solar panels during rainy days depends on factors such as the thickness of the cloud cover and the size and type of raindrops. Light rain or drizzle may have a minimal impact on solar panel efficiency, allowing for continued electricity generation. However, heavy rain or dense cloud cover can significantly reduce the amount of sunlight reaching the panels, resulting in a more substantial decrease in power output.

Additionally, advancements in solar technology, such as the development of rain-resistant coatings and improved panel designs, aim to enhance the performance of solar panels during adverse weather conditions. These innovations contribute to maintaining a more consistent and reliable energy output, even when faced with challenges like rainfall.

In summary, solar panels can indeed generate electricity during rainfall, albeit with reduced efficiency. The ability to capture diffuse sunlight and ongoing technological advancements in the solar industry ensure that solar panels continue to be a viable and effective renewable energy solution, even in less-than-ideal weather conditions.