Category: Physics

What is the advantage of a larger telescope? As the light collecting area of a light bucket is proportional to the diameter squared, doubling the diameter of the lens quadruples the light gathering power and thus greatly increases your ability to detect much fainter objects. The bigger the aperture, the more powerful the telescope. Is […]

What does it mean when pickups are out of phase? When they are out-of-phase, the two pickups work against one another; the resulting sound is simply the “leftovers” from the pickups’ cancellations. The closer the two pickups are, the greater the cancellations, meaning thinner sound and lesser volume. How do you tell if a pickup […]

Is Connections Academy really free? How Much Does Connections Academy Cost? Connections Academy is tuition-free just like other public schools. The only costs are for standard school supplies and optional field trips. How long does online school take per day? On average, students spend four hours online. The is no definitive guideline as to how […]

Is a lit match a catalyst? Enzymes are catalysts. They speed up the rate of a chemical reaction by reducing the activation energy, which is the energy needed to carry out the reaction. An example of a catalyst: if you put a lit match to a sugar cube, it’s hard to make the sugar catch […]

What is the source of energy generation in an AC generator? The source of energy generation is the mechanical energy of rotation of armature coil. How do you calculate the emf of an AC generator? The induced emf in a coil in AC generator is given as: E=NABωsinθ ω=dθ/dt. Now, when the angle between the […]

What is the pattern seen in the magnetic stripes on the seafloor? A polarity reversal means that the magnetic North flips to where we know the South Pole is. This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges. These patterns of stripes provide the history of seafloor […]

What does F X mean? input value What does FX mean in statistics? cumulative distribution function How do you find FX mean? Step 1: Find the midpoint of each interval. Step 2: Multiply the frequency of each interval by its mid-point. Step 3: Get the sum of all the frequencies (f) and the sum of […]

What injuries can seat belts cause? (6) Six Common Seatbelt Injuries: Bruised or Fractured Ribs. Chest and Sternum Injuries. Shoulder Injuries. Abdominal Soft Tissue. Abrasions and Lacerations. Sciatica, Herniated or Bulging discs, or Myalgias (muscle pains) Can a seatbelt bruise your ribs? 1: Ribs. Some of the more notable seat belt injuries you can have […]

Is Mirror translucent material? A mirror is an opaque object which does not allow light passes through it. The light cannot pass through the mirror from one side to the other side. This doesn’t mean that the mirror is a transparent object. Remember a mirror is actually a thin glass slab with its one side […]

What is the main limitation of First Law of Thermodynamics? The limitation of the first law of thermodynamics is that it does not say anything about the direction of flow of heat. It does not say anything whether the process is a spontaneous process or not. The reverse process is not possible. In actual practice, […]