What happen when you perform a cardiovascular activity? Cardiovascular exercise is any vigorous activity that increases heart rate and respiration and raises oxygen and blood flow throughout the body while using large muscle groups of the body repetitively and rhythmically. What is the relationship between physical activity and cardiovascular fitness? What is the connection between […]
Are superconductors 100% efficient?
Are superconductors 100% efficient? A superconducting material has absolutely zero electrical resistance, not just some small amount. If conductor resistance could be eliminated entirely, there would be no power losses or inefficiencies in electric power systems due to stray resistances. Electric motors could be made almost perfectly (100%) efficient. Which metal is superconductor? But at […]
Why are evenings cooler than afternoons?
What function does a nucleus have?
What function does a nucleus have? The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Is the nucleolus inside the nucleus? The nucleolus is a region found within the cell nucleus that is concerned with producing and assembling the cell’s […]
How do you set up dimensional analysis problems?
How do you set up dimensional analysis problems? Set up each problem by writing down what you need to find with a question mark. Then set it equal to the information that you are given. The problem is solved by multiplying the given data and its units by the appropriate unit factors so that only […]
Does reactivity increase left to right?
Does reactivity increase left to right? Chemical reactivity of the elements – definition Period – reactivity decreases as you go from left to right across a period. The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity. […]
When someone says you have a lot of potential?
When someone says you have a lot of potential? Don’t you just love it when someone says, “You have potential.” What does that really mean? It means you have the ability to pursue and conquer anything you put your mind to. It means you have gifts and talents dormant waiting to be manifested. What is […]
What would you use to measure 1 mL of DI water?
Where is a magnetic field the weakest?
Where is a magnetic field the weakest? equator What makes a magnet stronger or weaker? Most substances have an equal number of electrons spinning in opposite directions, which cancels out their magnetism. These substances have high magnetic permeability and make the strongest magnets. Iron, cobalt and nickel are among these substances. Neodymium iron boron (NdFeb) […]
Why force is directly proportional to pressure?
Why force is directly proportional to pressure? From equation (1) it is evident that as force increases, pressure also increases and as force decreases pressure also decreases since force is in the numerator. Or pressure is directly proportional to the applied force. Whereas as the area increases, the pressure decreases. i.e. it increases with the […]