Is time travel metaphysically possible?
Space and AstronomyIn some stories, time travellers cannot change the past. It is widely accepted that this is metaphysically possible. In some stories, time travellers can change the past. Many philosophers have explained how that, too, is metaphysically possible. Is it possible to travel back in time? Time travel is possible based on the laws of physics,
What makes the sun so special?
Space and AstronomyCompared with the billions of other stars in the universe, the sun is unremarkable. But for Earth and the other planets that revolve around it, the sun is a powerful center of attention. It holds the solar system together; provides life-giving light, heat, and energy to Earth; and generates space weather. What are 3 interesting
What is Euclidean distance in cluster analysis?
Space and AstronomyFor most common hierarchical clustering software, the default distance measure is the Euclidean distance. This is the square root of the sum of the square differences. What is Euclidean distance measure? Euclidean distance calculates the distance between two real-valued vectors. You are most likely to use Euclidean distance when calculating the distance between two rows
How many people are playing kahoot right now?
Space and AstronomyBusiness player limits Mode Standard Premium Plus Present 20 2000 Assign 20 2000 How many people are playing Kahoot now? Today, Kahoot! is used by 9 million teachers globally, hundreds of millions of students and families, and 97% of Fortune 500 companies. In the last 12 months, more than 300 million games have been played
Why is the graph of sine a wave?
Space and AstronomyThe graph of y=sin(x) is like a wave that forever oscillates between -1 and 1, in a shape that repeats itself every 2π units. Specifically, this means that the domain of sin(x) is all real numbers, and the range is [-1,1]. Why is sine a wave? A sine wave or sinusoidal wave is the most
What is on Dark Side of the Moon?
Space and AstronomyCapturing the dark side The ‘dark side’ of the Moon refers to the hemisphere of the Moon that is facing away from the Earth. In reality it is no darker than any other part of the Moon’s surface as sunlight does in fact fall equally on all sides of the Moon. Can you see anything
How do you find the secant angle of a circle?
Space and AstronomyHow do you find the secant angle? Video quote: And the rule which is very similar to one we've seen before with secant secant angles is the angle. Is equal to the far away arc. – the arc that's closest divided by two. How do you solve a secant in a circle? Two Secants Intersecting
What is tan in terms of sin and cos?
Space and AstronomyThe tangent of x is defined to be its sine divided by its cosine: tan x = sin x cos x . How do you write tan in terms of sin? Hint: To solve this problem, we will write tan A in terms of sin A and cos A (that is tanA=sinAcosA). How do you
Which is bigger solar system or universe?
Space and AstronomyThe universe is older. The solar system has a diameter more than 40 times greater than the distance to the sun, but the solar system is a tiny part of much larger galaxy. Our galaxy (Milky Way) is only one of billions of other galaxies in the universe. Size of the universe. Which is the
Why is the sum of the interior angles of a quadrilateral 360?
Space and AstronomyA quadrilateral is a polygon which has 4 vertices and 4 sides enclosing 4 angles and the sum of all the angles is 360°. When we draw a draw the diagonals to the quadrilateral, it forms two triangles. Both these triangles have an angle sum of 180°. Therefore, the total angle sum of the quadrilateral