What is the relationship between mass and acceleration when force is constant? Newton’s second law of motion (also known as the force law ) states that… acceleration is directly proportional to net force when mass is constant, and… acceleration is inversely proportional to mass when net force is constant, and consequently… net force is directly […]
What are three ways in which air is caused to rise?
What are three ways in which air is caused to rise? There are three main ways by which uplift of air can occur: convection, front and orographic (mountain) uplift. In each case, the rising air is forced to cool by expansion, releasing condensation first as cloud, and if uplift and cooling continues, as rain, hail […]
Does a peeled orange float in water?
Does a peeled orange float in water? Drop an orange into water and it floats, but remove the peel from that same orange and it will sink. The unpeeled orange floats because the rind is very porous and filled with tiny pockets of air. Even though you’re removing mass when you peel the orange, the […]
Why is NOx bad for the environment?
Why is NOx bad for the environment? High levels of NOx can have a negative effect on vegetation, including leaf damage and reduced growth. It can make vegetation more susceptible to disease and frost damage. NOx also reacts with other pollutants in the presence of sunlight to form ozone which can damage vegetation at high […]
What is the sphinx moth?
What is the sphinx moth? Hawk moth, (family Sphingidae), also called sphinx moth or hummingbird moth, any of a group of sleek-looking moths (order Lepidoptera) that are named for their hovering, swift flight patterns. These moths have stout bullet-shaped bodies with long, narrow forewings and shorter hindwings. Why is it called a sphinx moth? The […]
What is the process of glacier erosion?
What is the process of glacier erosion? Glaciers cause erosion in two main ways: plucking and abrasion. Plucking is the process by which rocks and other sediments are picked up by a glacier. They freeze to the bottom of the glacier and are carried away by the flowing ice. Abrasion is the process in which […]
How do you mess up a DNA swab test?
How do you mess up a DNA swab test? Avoid putting anything in your mouth for at least an hour prior to collecting cheek-cell samples. Foreign particles from food, liquids, toothpaste and tobacco byproducts don’t alter the DNA but they can mask it. The consequence is that the sample becomes degraded and therefore unusable for […]
Are Glade solid air fresheners Toxic?
Are Glade solid air fresheners Toxic? Swallowing some of a solid, cone-type air freshener is not likely to cause symptoms from the fragrance because it is imbedded into wax, which limits the amount that can be swallowed. Swallowing a small amount of wax is a choking hazard in young children, but is otherwise not expected […]
Do sharks have cartilage?
Do sharks have cartilage? Sharks, skates, rays and chimaeras stand apart from other jawed vertebrates in having a skeleton that is made primarily of cartilage rather than bone. Are shark jaws bone or cartilage? Different parts of a shark’s skeleton can have very different types of cartilage with different structure and function. But the whole […]
What is the highest level of cognitive domain?
What is the highest level of cognitive domain? Bloom identified six levels within the cognitive domain, from the simple recall or recognition of facts, as the lowest level, through increasingly more complex and abstract mental levels, to the highest order which is classified as evaluation. How many cognitive domains are there? The cognitive domain encompasses […]