Home / Tag Archives: Energy

Tag Archives: Energy

How is an exothermic reaction identified on a potential energy diagram?

Answered by answersmine AT 22/10/2019 – 02:30 AM Energy diagrams are use to depict the energy changes that occur during a chemical reaction. There are two types of reaction based on the energy change, these are exothermic and endothermic reactions. In endothermic reactions energy are gained while in exothermic reactions …

Read More »

The weight, w, of a spring in pounds is given by 0.9 times the square root of the energy, E, stored by the spring in joules. If the energy stored by the spring is 12 joules, what is the approximate weight of the spring in pounds?

Answered by answersmine AT 22/10/2019 – 02:34 AM The is the concept of algebra, the weight of the spring can be modeled by the equation;w=0.9sqrt Ewhere;=energy in joules;thus the weight of the spring when the energy is 12 j will be:w=0.9sqrt12w=3.18 g

Read More »

What is the net amount of energy released when one mole of h2o(?) is produced?

The net amount of energy produced can be obtained from a table of enthalpy change of formation, available online. The enthalpy change of formation indicate how much energy the 1 mole of the product (H2O) has relative to the elemental reactants (H2 and O2).  In other words, the “lost” energy …

Read More »

Geothermal energy consists of: a. wind and hydropower. b. energy stored in soil, underground rocks, and fluids in Earth's mantle. c. wave and tide power. d. energy from biomass.

Geothermal energy consists of: a. wind and hydropower. b. energy stored in soil, underground rocks, and fluids in Earth’s mantle. c. wave and tide power. d. energy from biomass.

Read More »

What is a potential benefit of fuel cell cars? increased efficiency converting gasoline to energy no recharging necessary decreased automobile cost larger engines

What is a potential benefit of fuel cell cars? increased efficiency converting gasoline to energy no recharging necessary decreased automobile cost larger engines

Read More »

Do you think geothermal energy is a renewable resource? Why or why not? What are the benefits of using this energy to power homes and businesses? Can you think of any consequences to communities or the surrounding environment?

Answer: Yes, Geothermal energy is a renewable source. Explanation: Geothermal energy is a renewable source because its source is generated unlimited amount of heat by the earth core. It is a sustainable energy source. It is also a non-renewable source because it can be re-used multiple times again and again …

Read More »

When might an organism rely on fermentation to produce the energy it needs? In situations where oxygen is no longer available Never because it will not produce the oxygen needed Only when oxygen supplies are in abundance When the Krebs cycle will not produce the energy needed

When might an organism rely on fermentation to produce the energy it needs? In situations where oxygen is no longer available Never because it will not produce the oxygen needed Only when oxygen supplies are in abundance When the Krebs cycle will not produce the energy needed

Read More »

How is energy converted in a hydroelectric plant? A) The kinetic energy of water is converted to electrical energy when water flows down the dam's channel and into the transformer. B) The potential energy of water is converted to electrical energy when water flows past a generator. C) The kinetic energy of water turns turbines; the mechanical energy of the turbines turns the generator, which produces electrical energy. D) The potential energy of water turns the generator's turbines, which results in the production of electrical energy.

How is energy converted in a hydroelectric plant? A) The kinetic energy of water is converted to electrical energy when water flows down the dam’s channel and into the transformer. B) The potential energy of water is converted to electrical energy when water flows past a generator. C) The kinetic …

Read More »

Why is water an excellent solvent for most ionic compounds and polar covalent molecules but not for non-polar compounds? A) Water is a polar molecule. B) Water has a charge like an ion. C) Water is a deionizing substance. D) Water molecules have an unusually high kinetic energy in the liquid state.

A)Water is a polar molecule. When talking about solubility, the rule that “like dissolves like” is usually correct. This means that polar substances are soluble in other polar substances. This occurs because the opposite partially charged ends of different polar molecules are attracted to each other. Similarly, the partially charged ends …

Read More »

Compare energy provided to the body by carbohydrates,proteins,and fats

Answered by answersmine AT 22/10/2019 – 04:00 AM Carbohydrates (carbs) provide ready energy to the body, and it’s in its quickest useable form. Proteins has the same caloric content per mass as carbs, yet it is not as useable. It takes longer to break proteins down into amino acids then …

Read More »

Which statement best describes how work and power are different? A)To find work we need to know force and distance; to find power we need to know force and velocity. B) To find work we need to know energy and time; to find power we need to know energy and distance. C)To find work we need to know velocity and distance; to find power we need to know distance and time. D)To find work we need to know distance and force; to find power we need to know energy and velocity.

Which statement best describes how work and power are different? A)To find work we need to know force and distance; to find power we need to know force and velocity. B) To find work we need to know energy and time; to find power we need to know energy and …

Read More »

How does cellular respiration explain why animals breathe rapidly when they are running? Energy is used up while running, and cellular respiration needs oxygen to produce more energy. Energy is used up while running, and cellular respiration needs carbon dioxide to produce more energy. Glucose is used up while running, and cellular respiration needs oxygen to make glucose. Glucose is used up while running, and cellular respiration needs carbon dioxide to make glucose.

Answer is: Energy is used up while running, and cellular respiration needs oxygen to produce more energy. Cellular respiration creates an energy molecule when glucose is broken down. Balanced chemical reaction for cellular respiration (convert biochemical energy):   C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy, or: glucose + …

Read More »

Which energy changes are associated with a liquid freezing? Energy is released as potential energy increases. Energy is absorbed as potential energy increases. Energy is released as potential energy decreases. Energy is absorbed as potential energy decreases.

Which energy changes are associated with a liquid freezing? Energy is released as potential energy increases. Energy is absorbed as potential energy increases. Energy is released as potential energy decreases. Energy is absorbed as potential energy decreases.

Read More »

What is an example of how you can be proactive about your personal health and wellness? Know your family health history and use reliable resources to research any family illnesses, because this will help you understand risks and available treatments Schedule regular doctor appointments, because getting checked by the doctor ensures that you will not get sick or contract communicable diseases Get extra sleep on days you don’t exercise, because this will help you keep your body composition in a healthy range and avoid changes in weight Use vitamins and performance-enhancing supplements, because they increase energy levels and help build muscles to keep your body physically fit Question 4(Multiple Choice Worth 1 points)

Answered by answersmine AT 22/10/2019 – 04:31 AM Your answer is: Know your family health history and use reliable resources to research any family.illnesses because this will help you understand risks and available treatments. By process of deduction, doctor’s appointments cannot perfectly ensure a lack of sickness, increasing sleep has studies …

Read More »

True or false, both mass spectrometry and infrared spectroscopy involve the interaction of molecules with electromagnetic energy

Answered by answersmine AT 22/10/2019 – 04:48 AM Yes, it is true, both mass spectrometry and infrared spectroscopy involve interaction of molecules with electromagnetic waves. ;Mass spectrometry method is used to determine the mass of a substance while infrared spectroscopy is used to determine the functional groups in molecules. Both …

Read More »

A 12-g sample of cooking oil, which is a fat, contains ________ kcal. (energy value for fat = 9 kcal/g)

25) Answer is: less metallic and more nonmetallic. Electronegativity increases from left to right across a period, atoms have tendency to attract electrons. Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons. 26) Answer is: radioisotope. Radioisotope has an unstable …

Read More »

Which process turns food into energy in any cell? A) photosynthesis Or B) cellular respiration

Correct answer: C). Genetically different haploid cells Meiosis is a type of cell division in which four haploid cells are produced, which are genetically different from the parent. It reduces the chromosome number exactly half as contained in the parent. That is why it is called as a reductional division. …

Read More »

Which statement best describes how a catalyst can speed up a chemical reaction? The catalyst makes lower energy pathways available. The catalyst increases the concentration of products. The catalyst binds to enzymes to release substrates. The catalyst increases the concentration of reactants.

There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism’s body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes …

Read More »