Extraction of metals. Metal ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them.
In physics, work is the energy transferred to or from an object via the application of force along a displacement.
A programmer writes a program to weigh baskets of fruit in grams, keeping a total of the weight and counting the number of baskets. The total weight is stored in
In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and
Transport in plants refers to the movement of water, nutrients, sugars, and other substances within a plant's body. There are two main types of transport in plants:
An algorithm has been written in pseudocode to input the names and marks of 35 students. The algorithm stores the names and marks in two arrays Name[ ] and Mark[
A biologist puts an initial population of 500 bacteria into a growth plate. The population is expected to double every 4 hours. Which of the following equations gives the expected
quizzes play a crucial role in assessing student understanding, promoting active learning, providing feedback, enhancing motivation, and preparing students for larger assessments
“Accept yourself, love yourself, and keep moving forward. If you want to fly, you have to give up what weighs you down.” ― Roy T. Bennett, The Light in the
“The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.”
A student takes 2 g samples of calcium carbonate and adds them to 20 cm3 samples of dilute hydrochloric acid at different temperatures. She measures how long it takes for
Synthetic polymerization refers to the process of chemically synthesizing polymers, which are large molecules composed of repeating subunits called monomers.
“If there is one lesson I've learned from failure and success, it's this. I am not the outcome. I am never the result. I am only the effort.”
These laws are fundamental principles that summarize and explain the behavior of the natural world.
A mixture is separated using the apparatus shown. What is the mixture? A aqueous copper chloride and copper B aqueous copper chloride and sodium chloride C ethane and methane D
Radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order
Fission is the process utilized in nuclear power plants to generate electricity, where controlled nuclear reactions are used to produce heat that boils water and drives turbines to generate electricity.
A clothing shop uses a barcode reader at the checkout. The checkout is linked to a stock control system. The system monitors stock levels and automatically keeps them above a
A student has four pieces of resistance wire made of the same material. Each piece is connected in turn between the terminals X and Y in the circuit.
Which statement is not correct? A-> Petroleum is a mixture of hydrocarbons. B ->The main constituent of natural gas is ethane. C-> The naphtha fraction of petroleum is used for