Category: Physics

What is something that weighs 1kg? An unabridged dictionary, a medium cantaloupe and a bottle of wine all weigh approximately 1 kilogram. Other 1-kilogram objects include a liter of water, a pineapple and a small laptop. Kilograms are part of the metric system, which is the standard of measurement in most of the world. What […]

Does higher Hz mean higher pitch? Dogs can detect frequencies as low as approximately 50 Hz and as high as 45 000 Hz. The sensation of a frequency is commonly referred to as the pitch of a sound. A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds […]

Is 42 psi too much for tires? 42 should be fine. Anything 17″ or larger with a with a 45% or less aspect ratio should use between 39-49 psi. 42 should be fine. Anything 17″ or larger with a with a 45% or less aspect ratio should use between 39-49 psi. What happens if you […]

What are the three scales used to measure temperature? Three scales are commonly used for measuring temperature. The Celsius and Fahrenheit scales are the most common. In which scale body temperature is measured? Thermometers measure temperature according to well-defined scales of measurement. The three most common temperature scales are Fahrenheit , Celsius , and Kelvin […]

Is Anammox an nitrification? Compared to conventional nitrification/denitrification in activated sludge systems, Anammox eliminates the necessity of an organic carbon source for nitrification, reduces energy demand for aeration and has a smaller production of excess sludge and lower CO2 emissions (BERTINO 2010). Why does Anammox occur? The anammox process occurs under anaerobic conditions by bacterial […]

Why is volumetric efficiency less than 100? If the cylinder is filled with fuel/air at atmospheric pressure, then the engine is said to have 100% volumetric efficiency. However, if the cylinder is pulling in a vacuum, then the engine has less than 100% volumetric efficiency. Normally aspirated engines typically run anywhere between 80% and 100% […]

What can you say about a number that ends in 1 When you write it in binary? 1. If the last digit of a binary number is 1, the number is odd; if it’s 0, the number is even. Ex: 1101 represents an odd number (13); 10010 represents an even number (18). 2. How do […]

What is the weight? The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg. Since the weight is a force, its SI unit is the newton. What is the normal human weight? The world average […]

Is Dory real? On coral reefs, “Dory,” the small vibrant blue fish with black stripes and a yellow tail, is known by several other names: Hippo Tang, Royal Blue Tang, Regal Tang, Palette Surgeonfish and by the scientific name Paracanthurus hepatus. Who is Dory’s boyfriend? John Reynolds as Drew Gardner Drew is Dory’s doting boyfriend […]

What age does a child develop a personal identity? Children begin to think about themselves and develop a self-concept during the ages of 3 to 5 years old. They are apt to describe themselves using very specific and concrete terms (e.g., “I’m 3 years old. Why do four and five year olds have difficulty understanding […]