Tag: science & technology

SN 1987A was a spectacular supernova in the Large Magellanic Cloud's Tarantula Nebula, visible to the naked eye in February 1987. It was the closest supernova observed in centuries and provided valuable data about stellar death.

E. Coli (Escherichia coli) is a common bacteria found in the intestines of humans and animals, but certain strains can contaminate food like beef and vegetables. These pathogenic strains cause foodborne illness and are a major concern in food safety.

Soft Tissue Sarcoma is the correct term for cancer tumors that form in the soft tissues including muscles, tendons, fat, blood vessels, and nerves. These tissues surround, connect, or support the body's structures and organs. Skin cancer, lymphoma, and gastrointestinal cancer affect different specific tissue types.

Mediastinal Tumor Resection is a thoracic surgery procedure involving the removal of tumors from the mediastinum (the central chest cavity between the lungs). Nissen Fundoplication is gastrointestinal, Cholecystectomy is abdominal (gallbladder removal), and Mitral Valve Repair is cardiac surgery - none are primarily thoracic procedures.

RNA viruses are unique because they use RNA instead of DNA as their genetic material. This allows for faster mutation rates since RNA viruses lack the proofreading mechanisms that DNA-based organisms have, making them evolve more quickly.

Rod monochromacy (achromatopsia) is a condition where all three types of cone photoreceptors are absent or nonfunctional. With only rod cells working, the person cannot distinguish colors and sees only in shades of gray, along with poor visual acuity in bright light.

Archimedes discovered the principle of buoyancy (often called the 'Eureka' moment) while trying to determine whether a golden crown was pure gold or contained silver. This method of measuring volume through water displacement is known as Archimedes' Principle. The 'Golden Crown' story is the classic example used to teach this concept.

Aryabhatta was India's first satellite, launched on April 19, 1975. Bhaskara-1 came later in 1979, while INSAT-1A was launched in 1982 as part of the Indian National Satellite System.

Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, with resistance (R) as the constant of proportionality, giving V = IR. The other options rearrange these variables incorrectly or don't represent Ohm's Law.