What are four things that indicate that a chemical change probably happened? There are five signs of a chemical change: Color Change. Production of an odor. Change of Temperature. Evolution of a gas (formation of bubbles) Precipitate (formation of a solid) What chemical is used in hot packs? Instant Hot and Cold Packs Commercial instant […]
How do you tell if your hearing is damaged?
How do you tell if your hearing is damaged? 10 Signs of Hearing Loss Speech and other sounds seem muffled. Difficulty hearing high-pitched sounds (e.g., birds, doorbell, telephone, alarm clock) Difficulty understanding conversations when you are in a noisy place, such as a restaurant. Difficulty understanding speech over the phone. How long does it take […]
Why is a burette more accurate?
Why is a burette more accurate? Burettes are larger than a pipette, it has a stopcock at the bottom to control the release of liquid. Burette is similar like graduated cylinder and is easier to measure a required volume of liquid through graduations. But, it has large meniscus and hence its accuracy and precision is […]
What are the three types of pain receptors?
What are the three types of pain receptors? Within the central nervous system, there are three types of opioid receptors which regulate the neurotransmission of pain signals. These receptors are called mu, delta, and kappa opioid receptors. What are the two types of pain fibers? Each of the spinal nerves emerging from the spinal cord […]
What is the relationship between valence electrons and bonding?
What is the relationship between valence electrons and bonding? Valence electrons are outer shell electrons with an atom and can participate in the formation of chemical bonds. In single covalent bonds, typically both atoms in the bond contribute one valence electron in order to form a shared pair. The ground state of an atom is […]
Is there a relationship between speed and acceleration?
Is there a relationship between speed and acceleration? Speed is the distance covered in a unit of time while acceleration is the rate of change of speed. The unit of speed in the metric system is meters per second (m/s) while that of acceleration is meters per second squared (m/s2). Speed is a scalar quantity […]
What food nutrient is best for exercise?
What food nutrient is best for exercise? Minimally processed foods are the best for sports and weight lifting nutrition. Lean protein, complex carbs and fiber are your best friends, especially if you’re trying to lose weight. Your body needs lean protein such as turkey, nonfat Greek yogurt, fish and egg whites to build muscle and […]
What is the minimum energy of harmonic oscillator?
What is the minimum energy of harmonic oscillator? Classically, the lowest energy available to an oscillator is zero, which means the momentum also is zero, and the oscillator is not moving. Compare the quantum mechanical harmonic oscillator to the classical harmonic oscillator at v=1 and v=50. On what factor does the angular frequency of simple […]
When 20.0 g of a substance are completely melted?
When 20.0 g of a substance are completely melted? When 20.0 grams of a substance is completely melted at its melting point, 820 Joules are absorbed. When a liquid is vaporized how much energy is gained? 20% Is heat released during evaporation? In the case of evaporation, the energy is absorbed by the substance, whereas […]
Is Hekla a shield volcano?
Is Hekla a shield volcano? An active volcano for centuries, the mountain Hekla is one of the most famous in the world. Hekla is a stratovolcano, located near the southern end of the eastern rift zone in Iceland. The whole mountain ridge of Hekla is about 40 km long. The fissure, Heklugjá, which splits the […]