Category: Physics

Can a vector be zero if one of its components is not zero? No, a vector can be zero if all components are zero. What is a non-zero vector? Not equal to zero. A nonzero vector is a vector with magnitude not equal to zero. Is a set with one vector linearly independent? A set […]

Why is SR-90 hazardous? The harmful effects of strontium-90 are caused by the high energy effects of radiation. Since radioactive strontium is taken up into bone, the bone itself and nearby soft tissues may be damaged by radiation released over time. What body part absorbs strontium? In the human body, most of the absorbed strontium […]

What is the highest form of intimacy? Level five is the highest level of intimacy. It is the level where we are known at the deepest core of who we are. Because of that, it is the level that requires the greatest amount of trust. Is kissing considered intimacy? Kisses that move the earth (or […]

Which of the following is the leading cause of death in midlife? CLEVELAND – A recent vital statistics report from the U.S. Centers for Disease Control and Prevention (CDC) indicates cancer and heart disease remain the two leading causes of death for middle-aged Americans. What is the most common change in sleep patterns of adults […]

What can bloodstain patterns tell an investigator? Bloodstain pattern analysis (BPA) is the interpretation of bloodstains at a crime scene in order to recreate the actions that caused the bloodshed. Analysts examine the size, shape, distribution and location of the bloodstains to form opinions about what did or did not happen. What type of evidence […]

Can humans see light speed? Yes. We can see the objects moving at speed of light. But we do not have that technology yet and we do not know if anything with mass can travel at speed of light. One can see objects if photons can reach his eyes even if he is travelling at […]

What are the three levels of physical activity? Exercise is categorized into three different intensity levels. These levels include low, moderate, and vigorous and are measured by the metabolic equivalent of task (aka metabolic equivalent or METs). The effects of exercise are different at each intensity level (i.e. training effect). What are the aims of […]

What are the top 5 driver distractions? Five Most Common Distractions While Driving Cognitive distraction. Cell phone use. Events outside the vehicle. Drivers may carry on conversations or even have arguments with their passengers while driving. Reaching for devices inside the vehicle. What type of distraction is adjusting the radio? Manual Distraction What is an […]

Which fuel produces the most energy per gram? Methane How much energy is released or absorbed when? Hence the energy released when 1gm of water at 0°C freezes to ice at 0°C is 334 J. Note – In order to answer this type of questions the key is to know the concept of latent heat […]

How do you size a disconnect? How to Calculate the Electrical Disconnect Switch Size Examine the appliance manufacturer nameplate on the appliance. Determine the horsepower rating of the appliance. Convert from volt-amps, watts or kilowatts to horsepower. Divide watts or volt-amps by 745.7 to obtain horsepower. Select a disconnect switch with the same or greater […]