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 […]
Why are the first 3 years of life so important?
Why are the first 3 years of life so important? Recent research confirms that the first five years are particularly important for the development of the child’s brain, and the first three years are the most critical in shaping the child’s brain architecture. They have a direct impact on how children develop learning skills as […]
What are 2 examples of gametes?
What are 2 examples of gametes? Examples of Gametes. The two most common gametes are sperm and ova. These two haploid cells can undergo internal or external fertilization and can differ from each other in size, form, and function. Some species produce both sperm and ova within the same organism. What are 3 types of […]
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 truck speed limit in California?
Is there no friction on ice?
Is there no friction on ice? When a skate moves over the surface of ice, the friction between the skate and the ice generates heat that melts the outermost layer of ice. But ice is still slippery even when you’re standing still. If you stand on ice without moving, no friction exists to generate heat, […]
What are the two factors of gravity and how do they affect gravitational pull?
What are the two factors of gravity and how do they affect gravitational pull? Newton’s law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them. Objects with greater mass have a stronger force of gravity between them. Objects that […]
Does friction depend on surface area?
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 […]
How can you identify a metal?
What are two differences between a compound and mixture?
What are two differences between a compound and mixture? Mixtures are the impure substances, made up of two or more physically mixed substances and not in the fixed ratio. Compounds are the pure form, made up of two or more chemically mixed elements and in a fixed ratio. Mixtures do not have meting or boiling […]