Category: Physics

Can the sign of the acceleration ever be positive for an object that is slowing down? According to our general principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, this object also has a positive acceleration. Is it true that acceleration only takes place when speeding […]

What activates and deactivates the electromagnet? Electromagnets Can Be Turned On and Off When the electrical current is active, the electromagnet produces a magnetic field. When it’s not active, the electromagnet doesn’t produce a magnetic field. After lifting the load and moving it to a different area, a worker may deactivate the electromagnet to release […]

What are pollutants give example? These are those which are emitted directly from the source and persist in the form in which they were added to the environment. Typical examples of pollutants included under this category are ash, smoke, fumes, dust, nitric oxide, sulphur dioxide, hydrocarbons etc. What are the major sources of pollutants? The […]

What happens when a PWC steering is turned to the right? For example, if the steering control is turned right, the nozzle turns right and the jet of water pushes the back of the vessel to the left, which causes the PWC to turn right. … When crossing paths What is the give way vessels? […]

Is it better to be upstairs or downstairs in an earthquake? In an earthquake, the area immediately outside a building is the most dangerous place to be. The taller the building, the wider the danger zone. A basic rule of thumb is if you are inside, stay inside and if you are outside, stay outside. […]

What are three common shortfall nutrients? Vitamin C, Potassium and Iron are considered to be shortfall nutrients. Proteins are nutrients but they are considered as common shortfall nutrients. What are two common shortfall nutrients? Folate and postassium are common shortfall nutrients. Which nutrients are considered shortfall nutrients? The shortfall nutrients, fiber, vitamin D, calcium, and […]

What is U value of insulation? A U-value is a sum of the thermal resistances of the layers that make up an entire building element – for example, a roof, wall or floor. It also includes adjustments for any fixings or air gaps. Is it better to have a higher or lower thermal conductivity? A […]

Which three of the following are examples of feedback mechanisms which help maintain homeostasis? Answer: The correct answer is- C. Insulin secretion in response to high blood sugar. D. F. Homeostasis can be described as a tendency of living organisms to maintain a state of stable internal environment. Thus, option C), D), and F) are […]

How do I find the volume of my washer? The formula for the volume of a washer requires both an inner radius r1 and outer radius r2. We’ll need to know the volume formula for a single washer. V = π (r22 – r12) h = π (f(x)2 – g(x)2) dx. As before, the exact […]

Why is it difficult for a high speed car to negotiate an unbanked turn? (a) A huge force is pushing the car outward. (b) The magnitude of the friction force might not be enough to provide the necessary radial acceleration. A car negotiating an unbanked road at high speed is actually accelerating as the direction […]