Category: Physics

Why are color test used? Color testing is a presumptive identification technique indicating the presence or absence of a particular drug class using rapid and uncomplicated chemical methods. Owing to their relatively recent emergence, a color test for the specific identification of synthetic cathinones is not currently available. What is a microcrystalline test? Introduction. A […]

How do you present a geometric solid? Presentation 1 Take out one of the more recognisable shapes, such as the sphere, and place it on the mat in front of you. Pick up and study the solid by gently moving your hands around the object. Say to the child: “This is a sphere.” Offer the […]

Which of these is a property of metals? A metal can refer to an element, compound, or alloy that is a good conductor of both electricity and heat. Example metals include gold, sodium, copper, iron, and many other elements. Metals are usually malleable, ductile, and shiny. Are metals usually brittle? Are metals usually brittle? The […]

What are the 5 changes of state? Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. What is an example of a change of state? 1 Answer. Phase changes include vaporization, condensation, melting, freezing, sublimation, and deposition. Evaporation, a type of vaporization, occurs when particles of a liquid reach a high enough […]

What would increase the resistance of a metal wire? Resistance increases with the temperature of the wire. When a material gets hotter the atoms in the lattice vibrate more. What happens to resistance when temperature decreases? Thus, resistance generally increases with temperature. For small temperature changes the resistivity varies linearly with temperature: In some materials […]

How long does it take to stop at 35 mph? At 35 mph it goes up to 136 feet, and you’re not really speeding yet. Switch up the numbers to freeway speeds—60 mph has a stopping distance of around 305 feet. That’s the length of an entire football field to stop. How many feet does […]

Why is the thermohaline circulation important for Earth quizlet? Thermohaline Circulation transports energy throughout the ocean, playing an important role in regulating temperature. As a result of global warming, the thermohaline conveyor belt could shut down because the water is not getting cold enough to downwell. What is the concept of thermohaline circulation? The basic […]

How do you do a scientific graph? Drawing Scientific Graphs Give your graph a descriptive title. Ensure you have put your graph the right way around. Determine the variable range. Determine the scale factor of the graph. Label the horizontal and vertical axes with units clearly. Remove any outliers. Draw a line of best fit. […]

What are 10 examples of heterogeneous mixtures? Examples include sand and sugar, salt and gravel, a basket of produce, and a toy box filled with toys. Mixtures in two or more phases are heterogeneous mixtures. Examples include ice cubes in a drink, sand and water, and salt and oil. What are the 10 examples of […]

How do you calculate heat loss of a metal? Thus: Heat lost by the metal = heat gained by the water, or Qmetal = (∆Tm)(mm)(sm) = Qwater = (∆Tw)(mw)(sw) where the subscripts m and w identify the metal and the water. In this equation, you will know both ∆T values because you will measure initial […]