Universal Constants: A New Foundation of Measurement    >   Innovate - Get Excited

Lesson 3 Quiz

What do you know so far?

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  1.  Planck’s constant describes the energy in:
  1. A kilogram
  2. A quantum x
  3. An atom
  4. An ampere
  1. A Kibble balance equates:
  1. Light and heat
  2. Light and mass
  3. Force and mass x
  4. Light and heat
  1. When metrologists changed the standard for mass from an object to a constant, they were able to increase:
  1. Accuracy x
  2. Precision
  3. Speed
  4. Reliability
  1. In the SI system, mass can be defined by Planck’s constant and by:
  1. The Candela
  2. The Kelvin
  3. Avogadro’s number x
  4. The speed of light
  1. An interferometer makes a precise measurement by comparing:
  1. Density
  2. Light beams x
  3. Concentration
  4. Sound waves
  1. In a homemade electromagnet, you could increase its magnetic force by increasing:
  1. The number of masses
  2. The size of the cell (battery)
  3. The voltage of the cell x
  4. The length of the wire
  1. Which of the following efforts is most benefited by the move from an artifact for mass to the use of a constant?
  1. The development of vaccines and antisera
  2. Coordination of international manufacturing x
  3. Development of more precise thermometers
  4. Determination of solar energy potential
  1. A researcher records the temperature of a star in Celsius and Kelvin. What is the difference?
  1. Kelvin is a direct measurement of energy. x
  2. Celsius will have a higher value.
  3. Celsius degrees are equivalent to Fahrenheit.
  4. Kelvin tells us the color of the stars.
  1. A Kibble balance can measure mass using Planck’s Constant. It can also measure Planck’s constant if ___ is known.
  1. Light speed
  2. Candelas
  3. Mass x
  4. Molarity
  1. The Kibble balance measures mass in terms of:
  1. Voltage x
  2. Light
  3. Heat
  4. Gravity
  1. Increasing the current in an electromagnet:
  1. Rotates the magnetic field.
  2. Reverses the magnetic poles.
  3. Changes the value of Planck’s constant.
  4. Increases the strength of the magnetic field. x
  1. An effort to create a “perfect” silicon sphere was part of an effort to create a standard for:
  1. The speed of light
  2. Avogadro’s number x
  3. Planck’s constant
  4. The quantum
  1.  On an international level, agencies like NIST have a primary role in:
  1. Advising and supporting research x
  2. Developing new research proposals
  3. Training physicists and chemists
  4. Raising funds for new research
  1.  What is the chief background and educational path of a metrologist?
  1. Biology
  2. Chemistry
  3. Physics
  4. Any of these x
  1. A new telescope is sited in the Atacama desert, where there is almost no humidity in the air and rare cloud coverage. Compared to a telescope in California, this instrument would be more:
  1. Inexpensive
  2. Precise x
  3. Adjustable
  4. Fragile
  1. Some agencies are supporting an effort to build smaller Kibble balances that would be used in sites around the world. What effect would this have?
  1. Different sites would have slightly different values for the kilogram.
  2. The definition of the kilogram could be tested by multiple masses.
  3. The mass might be re-defined in a few years after data are collected.
  4. More researchers would have access to accurate values. x
  1. When Max Planck looked at the radiation emitted by a “blackbody,” he found that radiant energy was released:
  1. In waves
  2. In discrete packets x
  3. In particles
  4. Into ether
  1. Planck’s work became the foundation of the science we call:
  1. Nanoengineering
  2. Bioastronomy
  3. Thermochemistry
  4. Quantum mechanics x
  1. Technology makes discoveries in science possible. The result of those discoveries is often:
  1. Obsolete technology
  2. New technology x
  3. Economic downturns
  4. Unemployment
  1. A science student enjoys perfecting procedures and improving reliability. A career choice that fits these interests is:
  1. College teaching
  2. Metrology x
  3. Climatology
  4. Theoretical physics