Explanation

Calculating the radius of the earth over a thousand years ago required a lot of imagination.

The 10th-century Persian mathematician Abu Rayhan al-Biruni used simple trigonometric results to estimate the radius and circumference of the Earth

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Explanation

A lead-acid battery consists of a negative electrode made of spongy or porous lead.

The lead is porous to facilitate the formation and dissolution of lead.

Explanation

Vaccines work by introducing a harmless version of a germ (an antigen) into the body to trigger an immune response.

The immune system then produces antibodies that will protect the body if it is ever exposed to the full-strength pathogen in the future.

The specific type of vaccine determines the form of the antigen used:

• Live-attenuated vaccines contain a weakened (or attenuated) form of the germ.
• These typically provide strong, long-lasting immunity with just one or two doses.
• Inactivated vaccines use the killed version of the germ.
• These often require multiple doses over time to maintain immunity.

Explanation

James Watt, a Scottish engineer, patented improvements to the steam engine in 1781.

He significantly enhancing its efficiency and power, and revolutionizing industry and transportation.

Explanation

Ebastine is a non-sedative H1 antihistamine that blocks the allergy-causing receptors.

It is an anti-allergic medication that cures allergy symptoms, such as sneezing, itchy eyes, runny nose, skin rashes, red eyes, and other symptoms.

Ebastine is an effective treatment for both perennial and seasonal allergic rhinitis.

Explanation

The USA developed the Pfizer COVID-19 vaccine in collaboration with BioNTech, a German company.

It was one of the first COVID-19 vaccines authorized for emergency use.

Explanation

Explanation

The USA developed the Pfizer COVID-19 vaccine in collaboration with BioNTech, a German company.

It was one of the first COVID-19 vaccines authorized for emergency use.

Explanation

Nigeria is the first country in the world to introduce vaccine for meningitis

Nigeria has become the first country in the world to roll out the "revolutionary" new Men5CV vaccine against meningitis.

Nigeria is one of the hotspots of the deadly disease in Africa.

In 2023, a 50% rise in annual cases was reported across 26 African countries regarded as meningitis hyperendemic countries

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Explanation

• a patient is receiving blood and experiences share with chill and his temperature is 110F. nurses should in this situation stop the blood immediately