on April 22, 2022
What is the Protoplanet theory?
Space and AstronomyHow did the Solar System’s planets come to be? The leading theory is something known as the “protoplanet hypothesis”, which essentially says that very small objects stuck to each other and grew bigger and bigger — big enough to even form the gas giants, such as Jupiter. Who proposed the protoplanet theory? W. H. McCrea
on April 22, 2022
How do they wash their hands in space?
Space and AstronomyThe astronauts wipe their body clean by using a wet towel, and wash their hair by using waterless shampoo. Since water does not flow in a zero-gravity environment, the astronauts cannot wash their hands under a faucet as you do on Earth. So, there are no sinks or showers inside the space shuttle. How do
on April 22, 2022
What is line definition of line?
Space and AstronomyWhat’s a definition of line? In geometry, a line can be defined as a straight one- dimensional figure that has no thickness and extends endlessly in both directions. It is often described as the shortest distance between any two points. Here, P and Q are points on the line. Fun Facts. A line segment is
on April 22, 2022
Why is the sine of 90 degrees 1?
Space and Astronomysin(90) is equal to 1 because you are taking the opposite of the angle over the hypotenuse, and in this situation it just happens to be the same number. Any number over itself equals 1. Is the sine of 90 degrees equal to 1? What is the exact value of sin 90 degrees? The exact
on April 22, 2022
What is the definition of known fact in math?
Space and Astronomyknown fact. A fact that you know by memory. expression. A combination of numbers and operations that represent a quantity. What is a known fact in 3rd grade math? Video quote: Using a known fact just simply means that you memorize. The fact. So for a problem like 7 times 5 sometimes things like songs
on April 22, 2022
What is Rotoinversion?
Space and AstronomyIn geometry, an improper rotation, also called rotation-reflection, rotoreflection, rotary reflection, or rotoinversion is an isometry in Euclidean space that is a combination of a rotation about an axis and a reflection in a plane perpendicular to that axis. What is Rotoinversion symmetry? The rotoinversion is the symmetry operation required to transpose one object onto
on April 22, 2022
What is a reflection in geometry?
Space and AstronomyA reflection is an isometry, which means the original and image are congruent, that can be described as a “flip”. To perform a geometry reflection, a line of reflection is needed; the resulting orientation of the two figures are opposite. How do you describe a reflection in geometry? A reflection is a transformation that acts
on April 22, 2022
What does center center mean?
Space and AstronomyCenter and centre have the same meaning. Center is the correct spelling in American English, while in British English centre is correct. Notice that center (and centre) can be a noun, adjective, or a verb. Seeing the two words in real-life examples may help you to visualize how to use them. What does in the
on April 22, 2022
How do you resolve vectors to horizontal and vertical components?
Space and AstronomyHow do you resolve vectors into vertical and horizontal components? Video quote: The angle between the slope and the direction of this vector is 55°. We could resolve this vector into two components. One component that is acting perpendicular to the slope or into the slope. How do you find the vertical and horizontal components?
on April 22, 2022
What is the difference between an expression and a function?
Space and AstronomyExpressions are “syntactical” objects, i.e. pieces of language. Functions are (mathematical) objects, i.e. pieces of the world. A function is described/specified by an expression; the same function can be described by more than one expression. Is an expression a function? Thus an expression represents a function whose inputs are the values assigned to the free