The ultrasound images demonstrate (green arrow)?  

Is correct the Femur Length measurement?

A resistor is connected to a 12 V battery, and a current of 3.0 A flows through the circuit. What is the resistance of the resistor?

Which of the following employees is a key employee for 2025? 1.     Matt, an officer of the company, who earns $100,000 per year and owns 2% of the company. 2.     Missy, who earns $37,000 per year and owns 4.5% of the company. 3.     Tara, an officer of the company who earns $255,000. 4.     Julie, a 10% owner of the company who earns $24,000 per year as a secretary.  

Robert, age 54, is a participant in a noncontributory qualified profit-sharing plan sponsored by his employer. The maximum that may be contributed to Robert’s account by the employer for the 2025 plan year is $23,500.  

6A. Planetary Differentiation (15pts Total, in two parts): (Part 1 of 2) 1.  [8pts] Briefly describe the Goldschmidt Classification of elemental affinities, as it pertains to differentiation of early Earth. (Be sure to include the names and important characteristics of the four different classification).  2. [2pts] What effect did the oxidizing nature of the solar nebula, from which Earth accreted, have on the subsequent differentiation of Earth and the formation of its layers? In other words, how might the composition of Earth’s mantle be different if the nebula had been reducing?  

9. Archaean Sphere Interactions (10pts Total): The graph below shows the composition of Earth’s atmosphere through time may be useful in answering this question. A) (7pts) CO2 (carbon dioxide) content of Earth’s atmosphere decreased rapidly from 35% at 3.3 Ga to less than 5% by 2.0 Ga. Explain the multi-step process by which CO2 was removed from the atmosphere. Please include verbal descriptions of different carbon/oxygen species in the series of chemical reactions that answer this question from start to end.   B) (3pts) Globally iron ore deposits are typically Late Achaean to Early Proterozoic in age. What was the source of the Fe at the Earths surface, and describe the process by which iron increased its from a few % to greater than 40% making it an economical ore deposit beginning around ~2.2 Ga (the graph may be of some assistance).

6B. Planetary Differentiation (15pts Total, in two parts): (Part 2 of 2) It had long been surmised that a meteor impact may have been responsible for the extinction of the dinosaurs at the end of the Mesozoic Period. However, it was not until 1980 when geologist, Walter Alvarez, discovered a sedimentary layer that was deposited at Earth’s surface at approximately the same time as the dinosaurs disappeared (~65 million years ago). What was special about the layer was it contained more than 100-times the concentrations of the element Iridium (Ir) than is found in any other sedimentary rock from any time. 1. [5pts]: Use the data plot of elemental abundances in Earth’s crust (below) to explain why high concentrations of the element Iridium (Ir-spike) at the end of the Mesozoic is suggestive of a large meteor impact (think about all questions you have answered thus far on this exam).

10. Plotting in Ternary Space (6pts Total)  Earth’s core is composed of a Ni-Fe alloy, whereas its mantle is composed predominately of three silicate minerals that compose a rock known as a peridotite. USE the Ternary Diagram below to Quantify the approximate percentage range of each of the end-member minerals that defines the composition of the mantle (shaded green area). Your answers should be within 5% of the minimum and maximum for each end-member mineral and place your answers in the Table below.    *Be sure you get the Maximum and Minimum values in the correct column for the correct row. Mineral Name Max% Min% Olivine [1] – [2] Clinopyroxene [3] – [4] Orthopyroxene [5] – [6]

7. Summarizing Early Differentiation of the Solar System (4pts) Make a list of the 4 main compositional types of extraterrestrial objects, some of which collide with Earth from time to time.  Explain what each compositional type tells us about the evolution of our early solar system. In other words how could each discrete compositional type have formed. 1) 2) 3) 4)