What led to the Bohr model? To remedy the stability problem, Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy. The energy of an electron depends on the size of the orbit and is lower for smaller orbits. This encouraged Bohr to use Planck’s constant in […]
Is aluminum hard to machine?
Is aluminum hard to machine? Fortunately, compared with other construction materials, aluminum is relatively easy to machine. It responds well to most fabrication methods, including milling, drilling, cutting, punching and bending. What is the lowest grade of aluminum? Grade 1050 aluminium Is aluminum toxic to the human body? Oral exposure to aluminum is usually not […]
Does equilibrium constant depend on pressure?
Does equilibrium constant depend on pressure? Equilibrium constants are not changed if you change the pressure of the system. The only thing that changes an equilibrium constant is a change of temperature. If there are the same number of molecules on each side of the equation, then a change of pressure makes no difference to […]
Which system of Signalling is used on a single line?
Which system of Signalling is used on a single line? Electric token To provide for this, the electric train token system was developed. Each single-line section is provided with a pair of token instruments, one at the signal box at each end. What is single line and double line? A double-track railway usually involves running […]
Do Eye Drops help with eye strain?
Do Eye Drops help with eye strain? Over-the-counter artificial tears can help prevent and relieve dry eyes. Use them even when your eyes feel fine to keep them well-lubricated and prevent a recurrence of symptoms. Your doctor can suggest which eyedrops might be best for you. What foods help eye strain? Ten best foods for […]
How do you start writing a hypothesis?
How do you start writing a hypothesis? Developing a hypothesis Ask a question. Writing a hypothesis begins with a research question that you want to answer. Do some preliminary research. Formulate your hypothesis. Refine your hypothesis. Phrase your hypothesis in three ways. Write a null hypothesis. What is a good sentence for hypothesis? Their hypothesis […]
Does an amendment to a motion have to be voted?
Does an amendment to a motion have to be voted? To Amend a Motion. After the motion to amend is seconded, a majority vote is needed to decide whether the amendment is accepted. Then a vote is taken on the amended motion. Who may withdraw a motion? (1) An attorney may request withdrawal by filing […]
How dangerous is the luge?
How dangerous is the luge? With speeds up to 90 mph, luge is one of the most dangerous sports in the Olympic Games. Luge is similar to skeleton but with athletes sliding down with their face up and feet first. This high-speed sport requires good upper-body strength and efficient navigation of the course. What is […]
What happens when sodium hydroxide is added to nitric acid?
What happens when sodium hydroxide is added to nitric acid? Reaction between sodium hydroxide and nitric acid is a textbook example of acid base neutralisation. Sodium ions combine with nitrate ions to form sodium nitrite and hydrogen ions react with hydroxide ions to form water. How do you balance nitric acid and sodium hydroxide? NaOH […]
What about a Type A personality has the strongest correlation with heart disease?
What about a Type A personality has the strongest correlation with heart disease? Those men with the strongest Type A scores were more likely to have heart attacks within five years. Those with lower scores had them a bit later, within nine years. What seems to be the most important component for coronary heart disease? […]