Category: Physics

What is the coldest liquid on Earth? Liquid helium Is liquid nitrogen or liquid oxygen colder? Liquid nitrogen has a lower boiling point at −196 °C (77 K) than oxygen’s −183 °C (90 K), and vessels containing liquid nitrogen can condense oxygen from air: when most of the nitrogen has evaporated from such a vessel, […]

What is the main reason for acid mine drainage? Acid mine drainage (AMD) is the runoff produced when water comes in contact with exposed rocks containing sulfur-bearing minerals that react with water and air to form sulfuric acid and dissolved iron. This acidic run-off dissolves heavy metals including copper, lead, and mercury which pollute ground […]

Which of the following is not true concerning the curl up test? The curl-up only tests the endurance of the abdominal muscles, not their strength. This statement is wrong regarding curl- up. What is the impact of age on flexibility quizlet? What is the impact of age on flexibility? Younger people tend to be more […]

Which compound would have a stronger ionic bond? Alf3 Why do some ionic compounds have low melting points? The melting and boiling points of molecular compounds are generally quite low compared to those of ionic compounds. This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy […]

Why does the ray of light passing through the optical Centre of a lens not get any deviation? The ray passing through optical center does no deviate because the curvature of the Lens at the incident and exit point are exactly opposite so the deviation at the first point is cancelled at the other point. […]

How is the Clean Water Act enforced? In the case of the Clean Water Act, the federal government relies on state agencies to enforce many of the key provisions of the law, including the National Pollutant Discharge Elimination System (NPDES), a system by which polluters are issued permits to emit specific quantities of pollution into […]

What is it called when two waves interact with the crests of one aligning with the troughs of the other? When two waves meet in such a way that their crests line up together, then it’s called constructive interference. The resulting wave has a higher amplitude. In destructive interference, the crest of one wave meets […]

Is fresh water a renewable resource? Freshwater exists on Earth’s surface in lakes, rivers, and ice, as well as below the surface as groundwater. Although freshwater is considered a renewable resource, the use of freshwater in some regions exceeds the ability of natural processes to replenish supplies. How is fresh water both a renewable and […]

Is 0.1 mm the same as 1mm? Please provide values below to convert millimeter [mm] to micrometer [µm], or vice versa….Millimeter to Micrometer Conversion Table. Millimeter [mm] Micrometer [µm] 0.01 mm 10 µm 0.1 mm 100 µm 1 mm 1000 µm 2 mm 2000 µm What is the ratio of 1mm to 1m? Thus, we […]

Is known as the way light reflects off a mineral? Luster describes the reflection of light off a mineral’s surface. Mineralogists have special terms to describe luster. One simple way to classify luster is based on whether the mineral is metallic or non-metallic. How can you identify a minerals color? You can identify a mineral […]