Category: Physics

What type of force produces a change in motion? Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces. What are five ways a force can change motion? Question: What are five […]

What do dogs hear when humans bark? So, when you hear dogs barking at one another the key thing that they are listening to is the type and tone of the bark. However, he may recognize the tone that you use when you bark at him. If you bark at your dog and he starts […]

Are most Christmas lights a series or parallel circuit? Christmas lights arranged in a series circuit use a single wire or string. All lights are connected one after the other to the source. The next type of setup are lights configured in a parallel circuit. Each light has its own path from the power source. […]

Do you exert more or less pressure when laying on the floor as opposed to standing up? The amount of pressure you exert when you are lying down would be less than the amount of pressure you exert when standing because, when standing, there is less surface area to be covered so the pressure is […]

What are the two types of substances? The two main types of pure substances are compounds and elements. They consist of a single type of particle or compound. What are the three substances? Chemical substances exist as solids, liquids, gases, or plasma, and may change between these phases of matter with changes in temperature or […]

What is a 4th order filter? A fourth order low pass filter is composed of two cascaded second order low pass filter sections. There is no limit to the order of the filter that can be formed; as the order of the filter increases, so does its size. What is the filter order? The maximum […]

Why are elements with less valence electrons more reactive? The less valence electrons there are, the less stable the atom becomes, causing it to react with other atoms. More valence electrons adds mass to the atom, making it less reactive. Which group of elements will lose valence electrons the easiest? In particular, cesium (Cs) can […]

How do you use somebody and someone? You use someone or somebody to refer to a person without saying who you mean. Carlos sent someone to see me. There was an accident and somebody got hurt. There is no difference in meaning between someone and somebody, but somebody is more common in spoken English, and […]

What is the purpose of the immersion oil that is used with the 100x objective? Oil immersion is the technique of using a drop of oil to wet the top of the specimen or slide cover and the front of the objective lens. This effectively immerses or bathes the light path between the lens and […]

How do you describe and interpret a graph? The caption on a graph, table, chart or image should describe the kind of information displayed in the graph so that readers immediately understand the information being presented to them. The key gives important information about the data in the graph and helps readers to understand the […]