3x10 8

Basic Math: Scientific Notation.

These two ideas together are enough to require that we think of the universe as a 4-dimensional space-time in which the time between two events depends on who measures it, and whether two things happen at the same time depends on who's asking. We can most easily understand a sequence of events by using a space-time diagram. I'll use one space dimension instead of 3, because I can't draw 4-D diagrams. The diagram shows that there is a limited region of space that we can know about: the region that lies within our past light cone. When the light hits the mirror it corresponds to "tick" and when it return to the detector that corresponds to "tock". Now consider two sets of observers, one set remaining at rest with respect to the clock and another set moving at speed v, as shown in the diagram. The second observers see a moving clock, and notice that the light must travel a greater distance.

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The second is the flatness problem: we don't know whether the universe is open or closed, but we do know that it is not very far from flat in either direction, 3x10 8.

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This free scientific notation calculator and converter can perform a range of operations in scientific notation, including adding, subtracting, multiplying, and dividing numbers. It can also convert real decimal numbers to scientific notation, and vice versa. To use the scientific notation calculator, simply input the numbers in scientific notation, select an operation, and click on the "Calculate" button to generate the output. Scientific notion, which is also referred to as "Standard Form" or "Exponential Form", represents a numerical value that is recorded in the following form:. It can readily characterize both very large and very small numbers.

3x10 8

Basic Math: Scientific Notation. In this section, you will occasionally be asked to answer some questions. Whenever a problem set is given, you should answer the questions on a separate sheet of paper and then verify your answers by clicking on "Answers. The first thing to learn is how to convert numbers back and forth between scientific notation and ordinary decimal notation. The expression "10 n ", where n is a whole number, simply means "10 raised to the nth power," or in other words, a number gotten by using 10 as a factor n times:. Notice that the number of zeros in the ordinary decimal expression is exactly equal to the power to which 10 is raised. If the number is expressed in words, first write it down as an ordinary decimal number and then convert. Thus, "ten million" becomes 10,, There are seven zeros, so in powers of ten notation ten million is written 10 7. By definition,.

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There are seven zeros, so in powers of ten notation ten million is written 10 7. We live in this region which now appears both very uniform and very flat. Since what you do to the exponent term undoes what you do to the coefficient, the total number does not change. You should move the decimal point until there is exactly one nonzero digit to the left of the decimal point, as in the last case of each example given. Thus the mass difference per reaction is:. If the number is expressed in words, first write it down as an ordinary decimal number and then convert. The sun and the stars produce energy by nuclear fusion. Notice that the number of zeros in the ordinary decimal expression is exactly equal to the power to which 10 is raised. Now answer the following on a separate sheet of paper and check your answers by clicking on "Answers": First Problem Set Express in scientific notation, and in ordinary notation: 1. A closed universe is curved like a basketball, and will ultimately collapse back upon itself because of the gravitational attraction of the matter within it, forming a "big crunch": an open uni- verse contains less matter, is curved like a saddle, and will expand for ever. The mass of 1 hydrogen nucleus is 1.

Use this calculator to add, subtract, multiply and divide numbers in scientific notation, E notation or engineering notation. Answers are provided in three formats: scientific notation, E notation and engineering notation.

According to the big bang theory, the universe began as a very hot soup of elementary particles, and cooled down as it expanded. Notice that the number of zeros in the ordinary decimal expression is exactly equal to the power to which 10 is raised. We can most easily understand a sequence of events by using a space-time diagram. In the same way, mass causes the whole universe to be curved. So, we'll deal with these first. Exactly on the boudary between these two kinds of universe is the flat universe which is not curved at all. In his general theory of relativity, Einstein asserted that the fundamental reference frames for making measurements are those moving with objects that fall freely under the influence of gravity. There is a simple procedure for getting a decimal number into the "standard form" for scientific notation:. The first thing to learn is how to convert numbers back and forth between scientific notation and ordinary decimal notation. If you are given a number in scientific notation to raise to a power, remember that all this means is that it is used as a factor that many times. Thus the mass difference per reaction is:. One is the horizon problem: given that the region of the universe we can know about our "past" is so small, how can the universe be so uniform? Basic Math: Scientific Notation. Quantum theory implies that the universe is an uncertain place. These two ideas together are enough to require that we think of the universe as a 4-dimensional space-time in which the time between two events depends on who measures it, and whether two things happen at the same time depends on who's asking.