How does lubricating a machine affect the output work from that machine? Infer how lubricating a machine affects the output force exerted by the machine. Friction is a force that opposes the motion of two surfaces sliding past each other. Lubrication a machine increases the output force because it decreases friction. The mechanical advantage of […]

What is another way to say I understand? Fair enough / I see where you’re coming from / I take your point / That makes sense. These are all polite ways to show that you understand and respect someone’s opinion, without having to say if you agree with them. Of course / Absolutely. What is […]

What needs to happen to odor molecules so we can smell them? Odor molecules in the air stimulate and inhibit the receptors. Each aroma sets off a signal made by the receptors that travels along the olfactory nerve to the olfactory bulb. The olfactory bulb sits underneath the front of your brain. Humans can recognize […]

What does a healthy biodiversity offer? Ecological life support— biodiversity provides functioning ecosystems that supply oxygen, clean air and water, pollination of plants, pest control, wastewater treatment and many ecosystem services. Recreation—many recreational pursuits rely on our unique biodiversity , such as birdwatching, hiking, camping and fishing. What are the 3 biggest threats to biodiversity […]

What 3 numbers make 72? Therefore, 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72 are the factors of 72….Factors of 72. 1 x 72= 72 therefore, 1 and 72 are a factor pair of 72 24 x 3= 72 therefore, 24 and 3 are a factor pair of 72 36 […]

At what point does rain need to freeze to be considered freezing rain? 32 degrees F What determines snow or freezing rain? The temperature of the air and land determine whether precipitation falls as snow, rain, sleet or freezing rain. If the temperature from cloud to ground stays below zero, snowflakes drift to Earth. However, […]

What happens when copper element loses two electrons? As the reactant with the high energy electrons “loses” its electrons, its oxidation state increases. In this example, elemental zinc has an oxidation state of 0; loss of two electrons raises its oxidation state to +2. Cu2+ ion gains two electrons (is reduced) to form copper metal. […]

Are fatty acid tails polar or nonpolar? The head of the hairpin is very polar and therefore likes to associate with water (it is hydrophilic), while the two fatty acid chains (the “tails”) are very non-polar and tend to avoid water (hydrophobic) and associate with other hydrocarbon chains. Why are hydrophobic tails nonpolar? In contrast, […]

What happens when a warm air mass moves over a cold air mass? When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses. This type of front is called a warm front. It generates nimbostratus […]

Which group of elements contains a metal metalloid and a non metal? Groups 13–16 of the periodic table contain one or more metalloids, in addition to metals, nonmetals, or both. Group 13 is called the boron group, and boron is the only metalloid in this group. The other group 13 elements are metals. Which list […]