Is a cookie sheet a conductor or insulator? It stops the flow of energy from moving through the material. Many objects that are meant for holding hot objects (soup containers, handles of pots and pans) are made out of heat insulators so that the heat will not transfer through the area it touches. For example, […]
Are there rattlesnakes at the Grand Canyon?
Are there rattlesnakes at the Grand Canyon? Grand Canyon rattlesnake on the North Kaibab Trail. The Grand Canyon is home to six species of rattlesnakes. These creatures control rodent populations in the Canyon, helping prevent the spread of disease and the over grazing of fruiting plants. Please observe these venomous predators from a distance. Are […]
What are the two mechanisms by which metal deforms?
What are the two mechanisms by which metal deforms? The mechanism by which metals deform is via the motion of linear defects at the atomistic scale, called dislocations (see the figure). In metals, dislocations are usually mobile, and their motion provides for the irreversible shifting of atomic planes in a process called slip, resulting in […]
Why does my dryer cause so much static?
Why does my dryer cause so much static? The tumbling action of the dryer causes fabrics to rub against each other and build up the electrostatic charges that zap and cling. You’ve probably noticed that static cling is much worse in the winter than summer months. Static electricity is formed more easily when the air […]
What is the purpose of using charts and graphs?
What is the purpose of using charts and graphs? Graphs and charts are visuals that show relationships between data and are intended to display the data in a way that is easy to understand and remember. People often use graphs and charts to demonstrate trends, patterns and relationships between sets of data. What are the […]
What type of image is formed by the concave side of the spoon?
What are the three aspects of health?
What are the three aspects of health? There are 3 major areas of the health triangle: physical, mental and social. Good decision making and healthy choices reduce the risk of disease and increase health overall. What are three aspects of overall health? The health triangle is a measure of the different aspects of health. The […]
What type of transport does not require energy?
What type of transport does not require energy? Key terms Term Meaning Passive transport Type of transport that does not require energy to occur Concentration gradient A region of space over which the concentration of a substance changes Permeability The quality of a membrane that allows substances to pass through it What are the three […]
What is the difference between a Class 1 and Class 2 transformer?
What is the difference between a Class 1 and Class 2 transformer? Class 1 transformers with an output that does not exceed 30 volts and 1,000 volt-amps. Class 2 refers to a transformer that delivers 100VA or less with a maximum output voltage of 30VAC or less. What is a Class 2 power unit? Class […]
Which of the following properties gets smaller as the strength of intermolecular forces increases?
Which of the following properties gets smaller as the strength of intermolecular forces increases? As the strengths of intermolecular forces increase, surface tension, viscosity, melting point and boiling point increase, while vapor pressure decreases. Molecular solid: Made up of discrete covalently bonded molecules held together in the solid phase by weaker forces (LD, dipole, or […]