Answer the following question given this paragraph: Things Great and Small Nuclear Decay Helps Explain Earth's Hot Interior A puzzle created by radioactive dating of rocks is resolved by radioactive heating of Earth's interior. This intriguing story is another example of how small-scale physics can explain large-scale phenomena. Radioactive dating plays a role in determining the approximate age of the Earth. The oldest rocks on Earth solidified about 3.510 9 years agoa number determined by uranium-238 dating. These rocks could only have solidified once the surface of the Earth had cooled sufficiently. The temperature of the Earth at formation can be estimated based on gravitational potential energy of the assemblage of pieces being converted to thermal energy. Using heat transfer concepts discussed in Thermodynamics it is then possible to calculate how long it would take for the surface to cool to rock9 9 formation temperatures. The result is about 10 years. The first rocks formed have been solid for 3.510 years, so that 9 the age of the Earth is approximately 4.510 years. There is a large body of other types of evidence (both Earth-bound and solar system characteristics are used) that supports this age. The puzzle is that, given its age and initial temperature, the center of the Earth should be much cooler than it is today (see Figure 31.26). Q: What method plays a role in determining the approximate age of the earth and makes use of uranium? Choices: - fuel dating - carbon dating - waste dating - radioactive dating A:
radioactive dating
(Question)
Answer the following question given this paragraph: This equation is based on the conservation of energy and conservation of charge. Electrical potential energy can be described by the equation PE = qV , where q is the electric charge and V is the voltage. Thus the energy supplied by the source is qV , while that dissipated by the resistors is. Q: Electrical potential energy can be described by the equation pe = qv, where q is the electric charge and v is what? Choices: - amplitude - wavelength density - frequency - voltage A:
(Answer)
voltage
Ques: Answer the following question given this paragraph: Potential energy is present in objects that are ______________. Q: Potential energy is present in objects that are what? Choices: - crystals - rigid - unstable - elastic A:
Ans: elastic
(Q).
Answer the following question given this paragraph: The new cell is stimulated with an electric shock and embryo development begins, as if it were a normal zygote . The zygote is the first cell of a new organism. Q: What is the first cell of a new organism? Choices: - nucleus - egg - seed - zygote A:
(A).
zygote
Ques:Answer the following question given this paragraph: Q: Upon entering the vestibular canal, the pressure waves push down on what duct? Choices: - the regrowth - the implant - the bile - the cochlear A:

Ans:the cochlear
Ques: Answer the following question given this paragraph: Air in the troposphere is warmer closer to Earth's surface. Warm air is less dense than cool air, so it rises higher in the troposphere. This starts a convection cell. Convection mixes the air in the troposphere. Rising air is also a main cause of weather. All of Earth's weather takes place in the troposphere. Q: Why does warm air rise higher in the troposphere? Choices: - it is more dense than cool air - It contains hydrogen - it is less flourishing than cool air - it is less dense than cool air A:
Ans:
it is less dense than cool air