Category: Physics

How many joules is a power strip? Energy absorption/dissipation – This rating, given in joules, tells you how much energy the surge protector can absorb before it fails. A higher number indicates greater protection. Look for a protector that is at least rated at 200 to 400 joules. For better protection, look for a rating […]

What is the output of a transformer? A transformers output voltage is greater than the input voltage if the secondary winding has more turns of wire than the primary winding. The output voltage is stepped up, and considered to be a “step-up transformer”. If the secondary winding has fewer turns than the primary winding, the […]

Which best describes accuracy? Answer: Accuracy is defined as the closeness of the measured value to the actual value. Therefore, out of the options, this is best described by A. the smallness of the graduations on a measuring tool. What happens if you have 2 modes? A set of numbers can have more than one […]

What is the concept of relative dating? Relative dating is the process of determining if one rock or geologic event is older or younger than another, without knowing their specific ages—i.e., how many years ago the object was formed. What is the definition of relative age? Relative age is the age of a rock layer […]

What is beak slang for? Beak, slang term for the drug cocaine. What is a duck’s beak called? The ducks mouth is called a beak or bill. It is usually broad and flat and has rows of fine notches along the edge called ‘lamellae’. The lamellae helps the duck to grip its food so that […]

What colors are for healing? Because it is believed that different colors have different emotional and psychological representations, these may be utilized in treatment to evoke certain responses and encourage healing like: Blue. A favorite color for many, blue can evoke feelings of calm and peace or sadness. Red. Orange. Purple. What is the best […]

How do you define focal length? For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive and is the distance at which a […]

How does oceanic crust from? Oceanic crust is continuously being created at mid-ocean ridges. As plates diverge at these ridges, magma rises into the upper mantle and crust. As it moves away from the ridge, the lithosphere becomes cooler and denser, and sediment gradually builds on top of it. Why is no oceanic crust older […]

What cause the object change in motion? A force is a push or pull that can cause an object to move, stop, or change speed or direction. 3. The greater the force, the greater the change in motion. Gravity (the earth’s pulling force) and friction (the force between two surfaces) are common forces that work […]

What do you mean by drift velocity? Drift velocity is the average velocity with which electrons ‘drift’ in the presence of an electric field. It’s the drift velocity (or drift speed) that contributes to the electric current. In contrast, thermal velocity causes random motion resulting in collisions with metal ions. On what factors drift velocity […]