Category: Physics

Can you die from parkour? Parkour is a risky passion and people have died before trying to do tricks. However, not many deaths caused while doing parkour are reported. Famous Russian traceur Pavel Kashin – Fell down 16 storeys to his death while attempting a stunt on a building rooftop. How hard is it to […]

Why is the breaking of a bond endothermic? BREAKING AND FORMING BONDS The amount of energy change in a reaction depends on the amount of bonds broken and formed. Bond breaking is an endothermic process, because it requires energy. Bond forming is an exothermic process, because it releases energy. What if Gibbs free energy is […]

When n 5 What is L? So, n=5 means it is the fifth electron shell. ‘l’ is the azimuthal quantum number and it describes electron subshell (s,p,d etc.). Basically, l=0 corresponds to s orbital, l=1 – p orbital, l=2 – d orbital and l=3 – f orbital. So, the final notation is 5f. How many […]

What happens to those born on February 29? Unlike the canine formula — anyone can multiply their age by 7 to get the answer — the Leap Day math applies to people born on Feb. 29. Those born on that day don’t always get to celebrate their actual birthday — since that date occurs only […]

Is it better to cook with stainless steel or nonstick? Stainless steel pans and surfaces are the best for browning ingredients-and since they’re usually uncoated, unlike nonstick varieties, they are more durable and resistant to slip-ups in the kitchen. Why do chefs prefer stainless steel? Chefs, professional cooks, and restaurants use stainless steel cookware. They […]

Can coefficient of friction be less than 1? The coefficient of friction is dimensionless and it does not have any unit. It is a scalar, meaning the direction of the force does not affect the physical quantity. The coefficient of friction depends on the objects that are causing friction. The value is usually between 0 […]

What does a pollen grain have to do in order to fertilize an egg? From the anther the pollen grains are first deposited on the pistil’s surface, the stigma. There they germinate and form pollen tubes, which grow downward through the style toward the ovules. Fertilization occurs as a sperm cell in a pollen tube […]

What is Q in heat transfer? The letter Q represents the amount of heat transferred in a time t, k is the thermal conductivity constant for the material, A is the cross sectional area of the material transferring heat, Δ T \Delta T ΔT is the difference in temperature between one side of the material […]

What is an example of a primary source? Some examples of primary source formats include: archives and manuscript material. photographs, audio recordings, video recordings, films. journals, letters and diaries. How do you know if a source is primary? Published materials can be viewed as primary resources if they come from the time period that is […]

Do ice have a fixed shape? For Example this ice cube is a solid. In a solid all the particles are closely compact, however they do vibrate, but they do keep a fixed shape. They do not have enough energy to move for themselves so they stay together in columns or rows usually. This is […]