Answer: 78 g of potassium Explanation: According to Lavoisier’s Law, the sum of the mass of the products must be equal to the sum of the mass of the reactants. On the reaction we have potassium oxide as product (K2O) and as reactants potassium (K) and Oxygen (O2) Having sayin …Read More »
Correct answer choice is : A) Food washing Explanation: Steep fruits and vegetables of all kinds in water for 5 minutes with 1-2 teaspoons of salt. Then, clean to wash out the salt. Use a water-and-vinegar suspension to soak food of all types. Soak fruit in a mixture of water …Read More »
Which statement is most likely a scientific law? A.Animals need oxygen because it unlocks the energy contained in food. B.Colonies of microscopic organisms grow faster in closed spaces because they cannot fly away. C.The oldest layers of rock lie below newer layers of rock on Earth. D.Healthy foods taste better than dangerous or spoiled foods.
Which statement is most likely a scientific law? A.Animals need oxygen because it unlocks the energy contained in food. B.Colonies of microscopic organisms grow faster in closed spaces because they cannot fly away. C.The oldest layers of rock lie below newer layers of rock on Earth. D.Healthy foods taste better …Read More »
According to the chart the Ash tree is the producer, the Tiger swallowtail is the first consumer, the Cardinal is the second consumer and the Sharp-shinned hawk is the tertiary consumer. Where would the Ash tree get its energy from?
According to the chart the Ash tree is the producer, the Tiger swallowtail is the first consumer, the Cardinal is the second consumer and the Sharp-shinned hawk is the tertiary consumer. Where would the Ash tree get its energy from?Read More »
Explain the cycling of energy through the processes of photosynthesis and cellular respiration.Read More »
In which calculation would the use of the mass-energy equivalence principle be needed? A. energy obtained from the burning of fossil fuels B. energy given off by a current flowing through a wire C. energy created by the conversion of mass of a uranium sample D. mass of coal burned in order to provide the energy needed for a large city
In evolutionary biology, mimicry is a similarity of one organism, usually an animal, to another that has evolved because the resemblance is selectively favoured by the behaviour of a shared signal receiver that can respond to both. Mimicry may evolve between different species, or between individuals of the same species. Often, mimicry evolves to …Read More »
Compare the food energy in calories from burning the chip and the saltine. How can you explain this differences in terms of chemical composition? A) The chip contains more lipids than the saltine. B) The saltine is a carbohydrate; the chip is a lipid. C) The saltine has less protein content than the chip. D) The chip is composed of starch; the saltine of simple sugars.
17. The SI unit for force is N. 18. When an Unbalanced force acts upon and object, the object will change speed and/or direction of motion. 19. Average speed is the speed averaged over a span of time. Instantaneous speed would be the speed at any given instance during that …Read More »
The correct answer to the question is violet. EXPLANATION: As per the question, the energy of the photon E = Let the wavelength of the photon is . From Planck’s quantum theory, we know that energy of a radiation having frequency f is h times the frequency of that wave. …Read More »
There is a public debate between the three candidates for the U.S. Senate. During the debate, the topics of oil and energy are addressed. Each candidate expressed their view on the issue: Edgar Eisenhower: “We need to cut our dependence on foreign oil. Instead, let’s use the natural world around us. Think about the sun, wind, water, the heat of the earth, and the crops in our fields. These will make for affordable energy in the 21st century. We should fund research in those areas. Let us also increase tax credits for private investment in clean, renewable sources of energy.” Rebecca Roosevelt: “We need to cut our dependence on foreign oil and develop a national energy strategy. We should provide tax incentives for producing energy in the U.S. Let’s increase U.S. supplies of coal, oil, and natural gas. We should promote environmentally responsible exploration and development of oil and gas reserves. That includes federal land like Alaska’s National Wildlife Refuge. Let’s also advance clean coal technology.” Terrance Taft: “Looking at our energy supply is one thing—how we’re using it is another. We can drive smaller, more fuel efficient cars. We can invest in more efficient technology for our homes and businesses. These things add up and make a big difference. In fact, in several new buildings associated with Taft Inc., we address our energy needs with locally produced renewable energy. That wouldn’t be possible if we were using outdated, energy guzzling technology.” Often politicians will agree that something is a priority, but have very different recommendations on how to best address it. What would be the best example of this from the previous section? 1. Both Terrance Taft and Edgar Eisenhower agree that inefficiency is bad, but disagree on how to make things more efficient. 2. Both Rebecca Roosevelt and Edgar Eisenhower agree that we need to reduce our dependence on foreign oil, but disagree on the best way of doing so. 3. Both Terrance Taft and Rebecca Roosevelt agree that alternative energy is important, but disagree about which form would be the best to invest in. 4. Both Rebecca Roosevelt and Terrance Taft agree that developing alternative energy sources is important, but differ on the best way of doing so.
Answer: The American participation in the Vietnam War was very different from its involvement in the Bay of Pigs Invasion. In the Vietnam War, the United States carried out direct participation, with first-hand military planning and execution and large-scale attacks. Some 60,000 Americans died in the conflict, of about one …Read More »
Posted in Physics Air resistance is the answer Related Questions Posted in Physics For the chemical reaction H2 + CO2 → H2O + CO, the energy contained in the reactants is 352 kJ, and the energy contained in the products is 394 kJ, assuming 1 mol of each substance is …Read More »
The formula for the energy stored in the magnetic field of an inductor is: E = (1/2) (inductance) (current)² . In the present situation: Energy = (3 kilo-watt-hour) x (1,000 / kilo) x (joule/watt-sec) x (3,600 sec/hr) …Read More »
In bohr’s atomic theory when electron moves from one energy level to another energy level more distant from the nucleus energy is emitted right?
I’m so glad you asked ! 1). If the bathtub is big enough to accommodate the length, width, and draft of the ship, and the tub is full of water, then the ship floats in the tub.(Strange as it may seem, the same can be said of the planet Saturn.) …Read More »
If all the genes of E. coli were active at once, what would result? 1. Conversation of energy and resources 2. Underproduction of enzymes 3. Cellular dysfunction 4. Increased rate of cell reproduction
Answer: The correct answer is – D) giraffes having increasingly longer necks over time. Natural selection is an evolutionary mechanism that was proposed by Darwin. According to this mechanism, organisms that are better capable of adapting to their changing environmental conditions, survive and increase their number through reproduction whereas other …Read More »
A push or pull that gives energy to an ob- ject, causing that object to start moving, stop moving, or change its motion is 1. friction. 2. pressure. 3. inertia. 4. a force. …?
This is a very interesting problem … mainly because it’s different from the usual questions in the Physics neighborhood. I can discuss it with you, but maybe not quite give you a final answer with the information you’ve given in the question. I agree with all of your calculations so …Read More »
Why are plants found at the beginning of a food web? A.All consumers eat plants. B.Plants convert the Sun’s energy into chemical energy. C.There are more plants than consumers. D.There are fewer plants than consumers. E.Decomposers thrive on plants.
A food web (or food cycle) is the natural interconnection of food chains and a graphical representation (usually an image) of what-eats-what in an ecological community. Another name for food web is a consumer-resource system. Ecologists can broadly lump all life forms into one of two categories called trophic levels: …Read More »
Answer: The following questions are clarifying the evidence that green house gas emissions are caused by human activity from 1990 to 2012: a. Which source of electricity generation caused the most emissions? b. What types of industries are responsible for greenhouse gas emissions? a. Which source of electricity generation caused …Read More »
Producer organisms convert _______ energy to chemical energy—the energy of c?h and c?o?h bonds.Read More »
Describe energy transformation and how it relates to the law of conversion of energy????Read More »
ATP stores energy for use in several cellular functions. Which of the following does not require the breakdown of ATP? A) biolumenescence B) enzyme production C) flagella movement D) diffusion
ATP stores energy for use in several cellular functions. Which of the following does not require the breakdown of ATP? A) biolumenescence B) enzyme production C) flagella movement D) diffusionRead More »
An iron fence is left on painted and it reacts with the oxygen in the air form forming rust. the formation of the rest is an oxidation-reduction reaction but it is also an example of a _____ reaction (1 point)8. cooking requires continuous addition of energy to the chemical reactions the are taking place the chemical reaction involved in cooking can be described as______? (1 point)9. measuring how quickly a reactanat disappears in one way to measure the ______of the reaction
Answer: The correct answer is option(A). Explanation: An iron atom emits particles when it is struck by light.This phenomena is called as Photoelectric effect. Photoelectric effect is defined as when photons (particles of light) falls on the metallic surface, electrons from the surface are ejected out and these ejected out …Read More »
Thermal energy is the energy associated with electric fields. being stored in chemical bonds. the pull of gravity. temperature.
Answer: (4)electrical conductivity Explanation: Given : 1.0 mole of and 1.0 mole of 1 mole of and 1.0 mole of ,. both have ions. Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound. Thus both and have same …Read More »
Explain how energy flows through this food chainRead More »
An exothermic reaction often requires greater safety precautions than an endothermic reaction, because of the amount of ______. A. time needed B. oxygen required C. energy released D. products formed
An exothermic reaction often requires greater safety precautions than an endothermic reaction, because of the amount of ______. A. time needed B. oxygen required C. energy released D. products formedRead More »
What do we call the FIRST organism in any food chain to get energy directly from a producer? A) primary consumer B) autotroph C) plant
Answer: Answer: The process of DNA replication, in order for cells to divide, is a pretty complex process that requires several enzymes to work. One such enzyme is polymerase, without which the process of DNA replication would not take place. It is polymerase that ensures the creation of a new …Read More »
They convert energy from the Sun into usable chemical energy by the process of photosynthesis. They are A) producers B) primary consumers C) decomposers
They convert energy from the Sun into usable chemical energy by the process of photosynthesis. They are A) producers B) primary consumers C) decomposersRead More »