Can Arccos be negative? The arccosine of a negative number is a second quadrant angle, cos-1(-) is in quadrant II. The arctangent of a positive number is a first quadrant angle, tan-1(+) is in quadrant I. Is SEC the same as Arccos? Note, sec x is not the same as cos-1x (sometimes written as arccos […]
How do online tutors get paid?
How do online tutors get paid? How does tutoring with us work? Start the application. Fill out some basic info about yourself, including education and work experience. Select subjects you’ve mastered. Connect with students. Begin tutoring students. Get paid each week. Can a 16 year old become a tutor? Some 16-year-olds are concerned that they […]
Which type of changes are temporary?
Which type of changes are temporary? Temporary change Temporary change is a change is for a limited time. Permanent , Temporary , Chemical & Physical Changes Examples of temporary change are : wet sand can change into dry sand. Is chemical change permanent or temporary? Chemical Change Permanent in nature. Since the original composition of […]
Can a hermaphrodite make a woman pregnant?
Can a hermaphrodite make a woman pregnant? Pregnancy in true hermaphrodites is rare. There are ten previously reported cases of pregnancy in true hermaphrodites with no reports on antenatal management. A 21-year-old primigravida Hispanic female presented at 9+ weeks gestation for prenatal care. At her birth, the patient had ambiguous genitalia. Are there any true […]
What part of the brain triggers the release of adrenaline?
What part of the brain triggers the release of adrenaline? After the amygdala sends a distress signal, the hypothalamus activates the sympathetic nervous system by sending signals through the autonomic nerves to the adrenal glands. These glands respond by pumping the hormone epinephrine (also known as adrenaline) into the bloodstream. When researchers create They are […]
Is Chernobyl still radioactive in 2019?
Is Chernobyl still radioactive in 2019? The ruins of the Chernobyl reactor, now contained under a metal shell, are still highly radioactive and will likely remain so for up to 20,000 years. Why did Valery alekseyevich legasov kill himself? He was buried at the Novodevichy Cemetery in Moscow. While not Legasov’s first suicide attempt, David […]
What is difference between atom and element with example?
What is difference between atom and element with example? A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms […]
What is melting point of naphthalene?
What is melting point of naphthalene? 80.26 °C What happens to naphthalene at its melting point? Freezing Point is the Melting Point This would be the melting point of naphthalene. After melting is complete, the temperature will begin to rise again until it reaches 218o C. It will stay at that point until boiling is complete. […]
Where is the tropical zone?
Where is the tropical zone? The tropics are regions of the Earth that lie roughly in the middle of the globe. The tropics between the latitude lines of the Tropic of Cancer and the Tropic of Capricorn. The tropics include the Equator and parts of North America, South America, Africa, Asia, and Australia. Which zones […]
Is 2Mg O2 2MgO exothermic?
Is 2Mg O2 2MgO exothermic? 2Mg+O2–> 2MgO + Heat. This is an exothermic reaction. Is mg o2 -> 2mgo balanced? Now, there are equal amounts of magnesium atoms and oxygen atoms on both sides, and so the equation is balanced. What kind of reaction is mg o2? Oxygen and magnesium combine in a chemical reaction […]