Category: Physics

What is a three dimensional vector? A 3D vector is a line segment in three-dimensional space running from point A (tail) to point B (head). Each vector has a magnitude (or length) and direction. What is the z component of a vector? The components of the vector specify the displacement from the tail to the […]

Can a refrigerator catch fire? Refrigerators. One might never think of a refrigerator being a fire risk; however, an overheated compressor or an electrical short can cause fires. In addition, a light that stays on all the time can be hazardous. Why is my freezer cold but fridge warm? The most common cause for this […]

Why is it important to learn the human body? We all only get one body, and it is important that we keep it healthy if we are going to have long and happy lives. Part of taking care of our health is understanding the different parts and systems of the body. You can make your […]

What happens to current in reverse bias? Reverse bias usually refers to how a diode is used in a circuit. If a diode is reverse biased, the voltage at the cathode is higher than that at the anode. Therefore, no current will flow until the electric field is so high that the diode breaks down. […]

What is the purpose of uncertainty? Uncertainty as used here means the range of possible values within which the true value of the measurement lies. This definition changes the usage of some other commonly used terms. For example, the term accuracy is often used to mean the difference between a measured result and the actual […]

What are three basic kinds of lines? Types of Lines Vertical lines: are straight up and down and perpendicular to horizontal lines. Horizontal lines: are straight up and down and perpendicular to vertical lines. Diagonal lines: are lines that straight in any direction except vertical or horizontal. What are the 8 types of lines? Terms […]

How many science process skills are there? thirteen science process skills What skills do scientists use? Scientists use skills like observing, inferring, predicting, classifying, evaluating, and making models to study the world. What is the science process skills? Science process skills are a set of skills used in scientific activities. Each activity is expected to […]

What is the source of energy for the car? Natural gas What is an advantage to alternative energy technology? Environmental and economic benefits of using renewable energy include: Generating energy that produces no greenhouse gas emissions from fossil fuels and reduces some types of air pollution. Diversifying energy supply and reducing dependence on imported fuels. […]

What are the 4 steps of the presentation? Here are four steps to help you improve your presentation skills: Set a Goal. Many presenters focus on practicing their delivery over and over, but forget to set a goal for the presentation. Write an Outline. With a goal in mind, now you can structure your presentation. […]

Is virus parasite or bacteria? Viruses are another type of tiny microorganism, although they’re even smaller than bacteria. Like bacteria, they’re very diverse and have a variety of shapes and features. Viruses are parasitic. That means they require living cells or tissue in which to grow. How do you kill parasites in your body? Eat […]