Category: Physics

What will happen if we cool a supersaturated solution? What happens when a supersaturated solution is cooled? The solid crystals in the hydrated crystals will dissolve into the bath, forming a supersaturated solution. When the solution for sodium thiosulfate is gradually cooled the super-saturated solution should remain liquid. What factors can cause a solution to […]

What is class 3 push? A push is force that moves away from you. A pull is a force that comes towards you. “A” is pushing, “B” is pulling. What is an example of push? An Example of push as a force would be to push on a swing. The force moves the swing in […]

Which has a better heat capacity copper or water? Water has a higher specific heat capacity because it has less of a tendency to change in temperature. Copper with the temperature of 60 degrees Celsius, and the same mass as that of the water in which it was placed, cooled off to 23.4 degrees Celsius. […]

How do you know if two elements will react? When deciding if a replacement reaction will occur, look up the two elements in question. The higher one will replace the lower one. Elements in the middle of the list will react with acids (but not water) to produce a salt and hydrogen gas. Is melting […]

What are the positive and negative effects of using GMOs? The pros of GMO crops are that they may contain more nutrients, are grown with fewer pesticides, and are usually cheaper than their non-GMO counterparts. The cons of GMO foods are that they may cause allergic reactions because of their altered DNA and they may […]

What is the best shape for a boat to float? A flat bottom is best, with sides to keep out the water and a large surface area that touches the water. Boats with lots of surface area are very wide, with lots of space inside. When pennies are added, the boat will float if the […]

Does the force of friction depends on the area of contact? Friction is a contact force when two surfaces interact. Notice that both of these friction formulas only depend on the coefficient of friction and the normal force. It does not depend the area of contact; it doesn’t depend on the sliding speed. Is acceleration […]

What is the Oregon Trail now? The eastern part of the Oregon Trail spanned part of what is now the state of Kansas and nearly all of what are now the states of Nebraska and Wyoming. The western half of the trail spanned most of the current states of Idaho and Oregon. Did the Oregon […]

When should I worry about pipes freezing? The Minimum Temperature to Keep Pipes From Freezing Depending on their exposure to wind and the elements, pipes can freeze when temperatures are higher than 20 degrees. In interior spaces, if pipes are near cracks or openings that let in cold air, they may develop ice blockages even […]

Are electromagnetic waves beneficial or harmful? Despite extensive research, to date there is no evidence to conclude that exposure to low level electromagnetic fields is harmful to human health. The focus of international research is the investigation of possible links between cancer and electromagnetic fields, at power line and radiofrequencies. What are the good effects […]