Does friction depend on surface area? 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 friction dependent on mass? Friction DOES […]
What is the relationship between metallic and ionization energy?
What is the relationship between metallic and ionization energy? Metallic character refers to the level of reactivity of a metal. The metallic character increases as you go down a group. Since the ionization energy decreases going down a group (or increases going up a group), the increased ability for metals lower in a group to […]
Why is rose quartz so powerful?
Why is rose quartz so powerful? “As a necklace, rose quartz is especially powerful because it’s worn close to the heart and heart chakra. This enables the heart center to open and release any tensions or stresses held there,” Birch claims. How long does it take to form rose quartz? Mine were formed in about […]
What is the most dangerous penguin?
What is the most dangerous penguin? Adélie Do penguins think humans are penguins? Penguins have no special fear of humans and will often approach groups of people. This is probably because penguins have no land predators in Antarctica or the nearby offshore islands. Instead, adult penguins are at risk at sea from predators such as […]
What factors affect London forces?
What factors affect London forces? The strength of London dispersion forces depends on the size of the molecule or atom. Larger atoms and molecules have more electrons. This leads to larger dipoles being established. London dispersion forces increase the larger the atomic size. What is the relationship between surface area and London dispersion forces? London […]
How can you identify a metal?
How do you calculate water current?
How do you calculate water current? To calculate the water flow (in m3/s) multiply the average water velocity by the average cross-section. To express this water flow in litres per second (l/s), multiply the result (in m3/s) by 1000. 0.486 m3/s x 1 000 = 486 l/s. What is the speed in still water? Still […]
Does every room need a vent?
Does every room need a vent? Today, it is recommended to have one or multiple air vents in each room of your home or business to optimize air flow and reduce the cost of energy spent on cooling your home or office. Do laundry rooms need vented doors? Most Dryer manufacturers will mandate a certain […]
What is the meaning of uncertainty in decision making?
What is the meaning of uncertainty in decision making? A decision under uncertainty is when there are many unknowns and no possibility of knowing what could occur in the future to alter the outcome of a decision. A situation of uncertainty arises when there can be more than one possible consequences of selecting any course […]
What is the velocity of star?
What is the velocity of star? In the Milky Way, stars usually have velocities on the order of 100 km/s, whereas hypervelocity stars typically have velocities on the order of 1000 km/s. Most of these fast-moving stars are thought to be produced near the center of the Milky Way, where there is a larger population […]