How do you keep a water bath at constant temperature? Example: You want the water to be at a constant 70c, heat the water up and put it in the main container, if its too hot then pour cold water, and vice versa. Once the temperature drops by a couple of degrees pour hot water […]
What does refractive index indicate?
What does refractive index indicate? Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or […]
Should you explain in classical mechanics a moving body with constant speed has no force?
Should you explain in classical mechanics a moving body with constant speed has no force? From classical mechanics, we know that the force is the rate of change of momentum, one of it’s simplest forms is F=ma, so if a body moves with constant velocity, then its acceleration is zero, and by the previous definition […]
What causes change to ecosystems?
What causes change to ecosystems? Important direct drivers include habitat change, climate change, invasive species, overexploitation, and pollution. Most of the direct drivers of degradation in ecosystems and biodiversity currently remain constant or are growing in intensity in most ecosystems (see Figure 4.3). Do ecosystems change little over time? Ecosystems, the interactive system of living […]
What is gamma decay stopped by?
What is gamma decay stopped by? Gamma radiation is the most penetrating. It can penetrate air, paper or thin metal. It may only be stopped by many centimetres of lead or many metres of concrete. What is the strongest ionizing radiation? Alpha particles What is the most dangerous type of ionizing radiation? Gamma rays are […]
Which atom will never form a double bond?
Which atom will never form a double bond? The double bond rule states that chemical elements with a principal quantum number greater than 2 for their valence electrons (period 3 elements and lower) tend not to form multiple bonds (e.g. double bonds and triple bonds) with themselves or with other elements. Can carbon form a […]
How many galaxies have we named?
How many galaxies have we named? All in all, Hubble reveals an estimated 100 billion galaxies in the universe or so, but this number is likely to increase to about 200 billion as telescope technology in space improves, Livio told Space.com. What are the 4 types of galaxies? In 1936, Hubble debuted a way to […]
Is wavelength directly proportional to frequency?
Is wavelength directly proportional to frequency? Wavelength is commonly designated by the Greek letter lambda (λ). Assuming a sinusoidal wave moving at a fixed wave speed, wavelength is inversely proportional to frequency of the wave: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths. Which Colour Has Highest intensity? violet What […]
Which mineral properties can you identify without special tools?
Which mineral properties can you identify without special tools? In working with hand samples without specialized tools, mineral hardness is specified by the Mohs hardness scale. The Mohs hardness scale is based 10 reference minerals, from talc the softest (Mohs hardness of 1), to diamond the hardest (Mohs hardness of 10). It is a relative, […]
What are six steps of the scientific method?
What are six steps of the scientific method? The scientific method consists of six steps: Define purpose. Construct hypothesis. Test the hypothesis and collect data. Analyze data. Draw conclusion. Communicate results. Which of the following lists the scientific method in the correct order? There are four basic steps involved with the scientific method. The usual […]