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Hi bobbym,

and are both correct. Marvelous!

#5506. Name the instrument / gadget : A type of non-magnetic compass which is based on a fast-spinning disc and rotation of the Earth (or another planetary body if used elsewhere in the universe) to automatically find geographical direction.

#5507. Name the inventor : The electric-powered washing machine, invented in 1908, was a great time- and sweat-saving device—but only for those who could afford it and had regular electricity. He noticed that many in his Fort Worth community didn’t fit that description. In 1934, he purchased four electric washing machines and installed them in the same building. He charged people by the hour to clean their clothes in his “washateria,” now better known as a laundromat.

Hi bobbym,

The Answer #686 (Angioma) is correct! Excellent!

#687. Name the medical term / phrase : (abbreviated MG) It is either an autoimmune or congenital neuromuscular disease that leads to fluctuating muscle weakness and fatigue. In the most common cases, muscle weakness is caused by circulating antibodies that block acetylcholine receptors at the postsynaptic neuromuscular junction, inhibiting the excitatory effects of the neurotransmitter acetylcholine on nicotinic receptors at neuromuscular junctions. Alternatively, in a much rarer form, muscle weakness is caused by a genetic defect in some portion of the neuromuscular junction, that is inherited at birth as opposed to developing it through autoimmunity later in life or through passive transmission by the mother's immune system at birth.

Hi bobbym,

The Answer #1834 is correct. Excellent, bobbym!

#1835. What does the adjective *therapeutic* mean?

#1836. What does the adjective *thespian* mean?

Hi bobbym,

The Answers #5502 (James Hargreaves) and #5503 (Moog synthesizer) are correct! Magnificent!

#5504. Name the French chemist (September 28, 1852 – February 20, 1907) who won the 1906 Nobel Prize in Chemistry for his work in isolating fluorine from its compounds. He was one of the original members of the International Atomic Weights Committee.

#5505. Sir Isaac Newton's *Philosophiæ Naturalis Principia Mathematica*, known as the *Principia*, is published by the Royal Society of London. In it, Newton describes his theory of universal gravitation, explains the laws of mechanics and gives a formula for the speed of sound. The writing of*Principia Mathematica* ushers in a tidal wave of changes in thought, significantly accelerating the scientific revolution by providing new and practical intellectual tools and becomes the foundation of modern physics. In which year was it published?

Hi David and bobbym,

The Answer #685 (cochlea) is correct. Good work, David and bobbym!

#686. Name the medical term : Benign tumors derived from cells of the vascular or lymphatic vessel walls (endothelium) or derived from cells of the tissues surrounding these vessels. They are a frequent occurrence as patients age, but they might be an indicator of systemic problems such as liver disease. They are not commonly associated with malignancy. They usually appear at or near the surface of the skin anywhere on the body, and may be considered bothersome depending on their location. However, they may be present as symptoms of another more serious disorder, such as cirrhosis. When they are removed, it is generally for cosmetic reasons.

Hi bobbym,

Both the Answers, #1831 and #1832, are correct. Excellent!

#1833. What does the noun *thane* mean?

#1834. What does the noun *thaumaturge* mean?

Hi bobbym,

and .

The Answer #5501 is correct. Marvelous!

#5502. Who invented the spinning jenny, a multi-spindle spinning frame, and was one of the key developments in the industrialization of weaving during the early Industrial Revolution, in 1764, England?

#5503. What invention was Robert Arthur Moog (May 23, 1934 – August 21, 2005), was an American pioneer of electronic music, known for?

Hi bobbym,

Good work!

#2372. The first term of an Arithmetic Progression is 5, the last term is 45, and the sum of terms is 400. Find the number of terms.

Hi bobbym,

#5433. Find the discriminant of the quadratic equation

.Hi bobbym,

The solution #5431 is correct. Exemplary!

#5432. Seven years ago, Varun's age was five times the square of Swati's age. Three years hence, Swati's age will be two-fifth of Varun's age. Find their present ages.

Hi bobbym,

The solution #2370 is correct. Brilliant!

#2371. How many terms of the series 54, 51, 48... be taken so that, their sum is 513?

Hi bobbym,

#685. Name the auditory portion of the inner ear. It is a spiral-shaped cavity in the bony labyrinth, in humans making 2.5 turns around its axis, the modiolus. A core component of it is the Organ of Corti, the sensory organ of hearing, which is distributed along the partition separating fluid chambers in the coiled tapered tube of it.

Hi bobbym,

#684. Name the medical term / phrase : (Also known as occipitofrontalis muscle) : A muscle which covers parts of the skull. It consists of two parts or bellies: The occipital belly, near the occipital bone, and the frontal belly, near the frontal bone. In humans, it only serves for facial expressions. The occipitofrontalis muscle receives blood from several arteries. The frontal belly receives blood from the supraorbital and supratrochlear arteries, while the occipital belly receives blood from the occipital artery. The occipitofrontalis muscle is innervated by the facial nerve.

Hi bobbym,

.

#2370. How many terms of the Arithmetic Progression : 9, 17, 25, ... must be taken to give a sum of 636?

Hi bobbym,

The solution #5430 is correct. Wonderful!

#5431. The sum of the reciprocals of a person's age (in years) 3 years ago and 5 years from now is

. Find the person's present age.Hi bobbym,

The solution #2368 is correct. Neat work!

#2369. Find the 20th term from the last term of the Arithmetic Progression 3, 8, 13, ....., 253.

Hi bobbym,

The solution #5429 is correct. Neat work!

#5430. Solve the quadratic equation

for x.Hi bobbym,

The solution(s) #2367 is / are correct! Neat work!

#2368. For what values of p are 2p + 1, 13, 5p - 3 three consecutive terms of an Arithmetic Progression?

Hi bobbym,

The solution #2366 is correct. Good work!

#2367. If Q (0,1) is equidistant from P (5,-3) and R (x,6), find the value of 'x'.

Hi bobbym,

The solution #2365 is correct! Excellent!

#2366. Find the value of 'y' for which the distance between the points P (2,-3) and Q (10,y) is 10 units.

Hi bobbym,

The solution #2364 is perfect. Remarkable!

#2365. Find the point on the x-axis which is equidistant from (2,-5) and (-2,9).

Hi bobbym,

The Answer #1829 is correct. Good work!

#1831. What does the adjective *tessellated* mean?

#1832. What des the adjective *testy* mean?

Hi bobbym,

The Answer #5498 (Imbibition) is correct! Neat work!

#5500. Who invented Xerography (or electrophotography), a dry photocopying technique in 1938? (He originally called his invention electrophotography.)

#5501. Name the German physicist, the first Nobel Prize in Physics in 1901 (27 March 1845 – 10 February 1923). In honour of his accomplishments, in 2004 the International Union of Pure and Applied Chemistry (IUPAC) named element 111, a radioactive element with multiple unstable isotopes, after him.

Hi bobbym,

The solution #2363 is correct. Good work!

#2364. Name the type of triangle PQR formed by the points

.Hi bobbym,

The Answer #682 (aneurysm or aneurism) is perfect. Magnificent!

#683. Name the medical term : In embryogenesis, it is a depression in the roof of the developing mouth in front of the buccopharyngeal membrane. It gives rise to the anterior pituitary (adenohypophysis), a part of the endocrine system. The pouch, and therefore the anterior pituitary, is derived from ectoderm. The pouch eventually loses its connection with the pharynx giving rise to the anterior pituitary. The anterior wall of it proliferates, filling most of the pouch to form pars distalis and pars tuberalis. The posterior wall forms pars intermedia.*Embryogenesis is the process by which the embryo forms and develops. In mammals, the term refers chiefly to early stages of prenatal development, whereas the terms fetus and fetal development describe later stages.*