Math N' Science Quiz

The key word for a gold element is "Au". This is because "Au" is the chemical symbol for gold on the periodic table.

The radius of a circle is the line segment that connects the center of the circle to any point on its circumference. It is essentially the distance from the center to the outer edge. This measurement is crucial in defining the size and proportions of a circle and is a fundamental component in various geometric calculations, such as determining the circle's area, circumference, and understanding relationships between different parts of the circle.

The diameter of a circle is twice the length of its radius. Since the radius is given as 30, the diameter would be 2 times 30, which equals 60.

The nucleus is a group of protons and neutrons joined by a strong force. It is the central part of an atom and contains most of the atom's mass. The protons in the nucleus have a positive charge, while the neutrons have no charge. The nucleus is surrounded by electrons, which orbit around it in specific energy levels.

The formula for a rectangle is given by multiplying its length (l) by its width (w). Therefore, the correct answer is l x w.

When you subtract a larger number from a smaller number, the result is a negative number. The numerical difference between the smaller and larger numbers indicates the extent by which the smaller number falls short of the larger one. The negative sign signifies that the result is in the opposite direction or "below zero" on the number line.

As the variable approaches zero, the value of the constant divided by the variable becomes larger and larger. Since there is no limit to how large a number can be, the limit of a constant over a variable as the variable approaches zero is infinity.

A number is a mathematical concept and a symbol used to represent a quantity. It can be an integer (whole number), a fraction, a decimal, or even an irrational value like the square root of 2. Numbers are fundamental to mathematics and are used for counting, measuring, and expressing relationships between quantities. They play a crucial role in various mathematical operations such as addition, subtraction, multiplication, and division.

When you multiply 0.1 by 10, you are essentially multiplying 0.1 by 10/1. The multiplication yields 1, as the numerator and denominator cancel each other out, leaving 1 as the final result.