What is the point of a cupola?

What is the point of a cupola?

Cupolas were originally designed to add natural light and ventilation to the area under a roof. They sit on the ridge of a roof and can be found in many shapes, including square, round, and octagonal. On barns, they're meant to allow a continuous flow of air into the hayloft, helping to dry the hay.

How does a wind vane help predict weather?

A barometer is needed to measure the air pressure. A wind/weather vane is used to determine wind direction. The wind vane should be placed in an open area where it can rotate freely as the wind direction changes. An anemometer is used to measure wind speed.

Why do we need to measure weather and keep a record?

Measuring and predicting the weather has the capacity to help people, businesses, farmers, transport systems and provide warning systems. It is also important in determining an area's climate, which involves measuring the weather over a long period of time.

Why does wind change direction?

Prevailing winds are winds that blow from a single direction over a specific area of the Earth. ... This happens because Earth's rotation generates what is known as the Coriolis effect. The Coriolis effect makes wind systems twist counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

Do trade winds change direction?

The Coriolis Effect, in combination with an area of high pressure, causes the prevailing winds—the trade winds—to move from east to west on both sides of the equator across this 60-degree "belt." ... The sinking air triggers the calm trade winds and little precipitation, completing the cycle.

How does temperature affect weather?

Changes in temperature affect how many molecules are packed into the atmosphere. Warm weather brings low-pressure systems: Warm air expands so there are fewer air molecules in the atmosphere. Low- pressure systems usually bring cloudy and rainy days.

Can climate change make it colder?

Climate change won't necessarily make European winters colder because the outbreaks of cold air from the polar vortex are sometimes milder than the current cold snap. The Arctic is also not the only part of the world where air currents are changing because of rising temperatures.

How does temperature affect pressure?

As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.

Does heating increase pressure?

If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure. Conversely if you cool the molecules down they will slow and the pressure will be decreased.

Why is temperature and pressure directly proportional?

The pressure law states that for a constant volume of gas in a sealed container the temperature of the gas is directly proportional to its pressure. ... This means that they have more collisions with each other and the sides of the container and hence the pressure is increased.

Is there a relationship between temperature and pressure?

We find that temperature and pressure are linearly related, and if the temperature is on the kelvin scale, then P and T are directly proportional (again, when volume and moles of gas are held constant); if the temperature on the kelvin scale increases by a certain factor, the gas pressure increases by the same factor.

Are temperature and pressure directly proportional?

The pressure of a given amount of gas is directly proportional to its absolute temperature, provided that the volume does not change (Amontons's law). ... The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).

What law is P1V1 P2V2?

The relationship for Boyle's Law can be expressed as follows: P1V1 = P2V2, where P1 and V1 are the initial pressure and volume values, and P2 and V2 are the values of the pressure and volume of the gas after change.

Does increasing temperature increase volume?

The volume of the gas increases as the temperature increases. As temperature increases, the molecules of the gas have more kinetic energy. They strike the surface of the container with more force. If the container can expand, then the volume increases until the pressure returns to its original value.