Why was it hard for many immigrants to find jobs in the US in the late 1800s? Why was it hard for many immigrants to find jobs in the United States in the late 1800s? They had specific training that was not useful in the US job market. They were commonly discriminated against by potential […]
What does retardation and acceleration mean?
What does retardation and acceleration mean? Acceleration is referred to as the increase in velocity of an object per unit of time. Whereas. Retardation is just the opposite of acceleration or the decrease of velocity per unit of time. Acceleration can be positive(+),0,or negative(-). Negative of acceleration is known as retardation. Is ADHD inherited from […]
Do waves carry energy?
Do waves carry energy? Waves carry energy from one place to another. Because waves carry energy, some waves are used for communication, eg radio and television waves and mobile telephone signals. There are many types of waves including sound waves, water waves and all the parts of the electromagnetic spectrum. Why do waves carry energy […]
What is the smallest particle we can see with a microscope?
What is the smallest particle we can see with a microscope? The smallest thing that we can see with a ‘light’ microscope is about 500 nanometers. A nanometer is one-billionth (that’s 1,000,000,000th) of a meter. So the smallest thing that you can see with a light microscope is about 200 times smaller than the width […]
What is the number of molecules in a given volume called?
What is the clearance for fire extinguishers?
What is the clearance for fire extinguishers? Cal OSHA mandates different distribution requirements within the building for each extinguisher class. Class A and D fire extinguishers must be supplied every 75 feet or less; Class B extinguishers every 50 feet or less; Class K extinguishers are required every 30 feet. Which OSHA regulation requires your […]
What causes the appearance of the moon to change?
What causes the appearance of the moon to change? The Moon doesn’t emit (give off) light itself, the ‘moonlight’ we see is actually the Sun’s light reflected off the lunar surface. So, as the Moon orbits the Earth, the Sun lights up different parts of it, making it seem as if the Moon is changing […]
What are the 2 types of adaptation?
What are the 2 types of adaptation? There are two main types of adaptation: physical and behavioral. Physical adaptations are special body parts that help a plant or animal survive in an environment. How long does it take for a human to adapt? For reasons that are not completely clear, the data show the long-term […]
How can I make a magnetic compass at home without water?
What Colours absorb the most heat?
What Colours absorb the most heat? The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of light […]