on April 25, 2022
What is ref in sequence diagram?
Space and Astronomyref Reference: refers to an interaction defined on another diagram. The frame is drawn to cover the lifelines involved in the interaction. You can define parameters and a return value. What is ref in UML? To reference other interactions in a UML sequence diagram, interaction uses can be used. An interaction use is a fragment
on April 25, 2022
What is the inverse of cos theta?
Space and Astronomy–1“>cos–1θ = cos–1[ (adjacent side) / (hypotenuse) ]. What is the inversion of Cos? Since cosine is the ratio of the adjacent side to the hypotenuse, the value of the inverse cosine is 30° , or about 0.52 radians. Is SEC inverse of cos? The secant function is a multiplicative inverse to the cosine function,
on April 25, 2022
What is Trinomial expression?
Space and AstronomyWhat are trinomial expressions? A trinomial is an algebraic expression that has three non-zero terms. Examples of a trinomial expression: x + y + z is a trinomial in three variables x, y and z. 2a2 + 5a + 7 is a trinomial in one variables a. xy + x + 2y2 is a trinomial
on April 25, 2022
What is transformation in math geometry?
Space and AstronomyTransformations. Transformation means to change. Hence, a geometric transformation would mean to make some changes in any given geometric shape. What is transformation mean in geometry? A transformation is a general term for four specific ways to manipulate the shape and/or position of a point, a line, or geometric figure. The original shape of the
on April 25, 2022
Who postulated the progressive wave theory of Tides?
Space and AstronomyWilliam WhewellWilliam Whewell. Who discovered tidal waves? Sir Isaac Newton’s Tides originate in the ocean and progress toward the coastlines, where they appear as the regular rise and fall of the sea surface. Thanks to Sir Isaac Newton’s 1687 discovery, we know that tides are very long-period waves that move through the ocean in response
on April 25, 2022
What is meant by statistical independence?
Space and AstronomyTwo events are independent, statistically independent, or stochastically independent if, informally speaking, the occurrence of one does not affect the probability of occurrence of the other (equivalently, does not affect the odds). Why is statistical independence important? The assumption of independence is a foundation for many statistical tests. The assumption of independence is used for
on April 25, 2022
What is the sun made out of NASA?
Space and AstronomyStructure. The Sun is a huge ball of hydrogen and helium held together by its own gravity. What is the Sun in space made of? The sun is a big ball of gas and plasma, but what is the sun made of exactly? Most of the gas — around 92% — is hydrogen, according to
on April 25, 2022
How do you measure the diameter of a pole?
Space and AstronomyStep 1 – Measure the circumference of the post (distance around the post). Step 2 – Take that measurement and divide it by pi (3.14) to determine the post diameter. What is the diameter at the pole? Equatorial vs Polar Diameter: Because of this, the diameter of the Earth at the equator is about 43
on April 25, 2022
What holds the sun together?
Space and AstronomyStructure. The Sun is a huge ball of hydrogen and helium held together by its own gravity. How does the Sun stay in one place? The Sun spins or rotates on its axis in the same direction as Earth (counterclockwise, when looking down from the north pole). Because it is a gas, it does not
on April 25, 2022
What does Blue shifting mean?
Space and AstronomyWhat does Blue shifting tell us? When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift. Astronomers use redshift and blueshift to deduce how far an object is away from Earth,