How do you calculate the energy of an electron in the ground state of a hydrogen atom? A simple expression for the energy of an electron in the hydrogen atom is: E=−13.6n2 where the energy is in electron volts. n is the principle quantum number. So for an electron in n=1 : E=−13.6eV. To convert […]
How does memory affect learning process?
How does memory affect learning process? Memory is essential to learning, but it also depends on learning because the information stored in one’s memory creates the basis for linking new knowledge by association. It is a symbiotic relationship which continues to evolve throughout our lives. What is retention of information? Retention of learned information can […]
How many sports should a kid play?
How many sports should a kid play? Playing Multi-sports A lot of studies supported that kids should be encouraged to play more than one sport because of the many benefits it provides to your kid. Should parents let their child play sports? In the long-term, concussions may cause negative emotional and cognitive changes. The survey […]
Is San Francisco earthquake safe?
Is San Francisco earthquake safe? San Francisco Bay Area earthquake risk map with fault lines San Francisco is very vulnerable to earthquakes. Its three notable faults, covered below, are right-lateral strike-slip faults. What will happen if a tsunami comes? A tsunami can kill or injure people and damage or destroy buildings and infrastructure as waves […]
Is the bending of rock layers due to stress?
Is the bending of rock layers due to stress? The bending of rock layers in response to stress is called folding. Scientists assume that all rock layers start as horizontal layers. When scientists see a fold, they know that deformation has taken place. All folds have a hinge and two limbs. What causes rock layers […]
How cold does it have to be for RV pipes to freeze?
How cold does it have to be for RV pipes to freeze? In general, the temperature has to dip below freezing (32 F) for approximately 24 hours for RV pipes to freeze. This is all dependent on many factors such as if you have an enclosed underbelly, heated underbelly, heat tape, insulation, or other preventative […]
When driving down a mountain you should never?
How do you make a good regression model?
How do you make a good regression model? 7 Practical Guidelines for Accurate Statistical Model Building Remember that regression coefficients are marginal results. Start with univariate descriptives and graphs. Next, run bivariate descriptives, again including graphs. Think about predictors in sets. Model building and interpreting results go hand-in-hand. What is a good R2 value? While […]
Do receptacles need 20 amps?
Do receptacles need 20 amps? Appliances, such as microwaves, often have 20-amp plugs and must be plugged into a 20-amp outlet. Electrical plugs designated as 20-amp will not fit into 15-amp outlets. A 20-amp circuit, protected by a 20-amp breaker or fuse, must be served by 12-gauge or 10-gauge wire. How many outlets can be […]
When two point charges of magnitude q1 and q2 are separated by a distance r the magnitude of the electrostatic force between them is F?
When two point charges of magnitude q1 and q2 are separated by a distance r the magnitude of the electrostatic force between them is F? Thus upon changing the charges and distance between the charges the magnitude of the new force will be two times the magnitude of earlier force, i.e. 2F. What is the […]