A 26-year-old client comes to the clinic for an HIV test after a potential exposure 10 days ago. The client’s Nucleic Acid Test (NAT) is negative. Which of the following is the best response by the nurse?

(WCSP25) School nurses often provide “ice packs” to injured students.  These packs do not contain ice!  Instead, the pack is squeezed or cracked to break an internal package allowing two chemicals to mix: water and ammonium chloride (NH4Cl).  The temperature of the pack becomes quite cold! Complete the following statements to be true: a. The system [drop1] heat. b.  The chemical reaction taking place is [drop2].  c. The sign of ΔH is [drop3] with respect to the system. [drop3]

(WCSP25) A neutral atom in an excited state has the following electron configuration: 1s2 2s2 2p5 3s2 3p6 4s2 3d4   a.  What is the identity of the atom?  (enter symbol) [blank1] b. If the excited electron relaxes to its ground state:             i. Energy will be (  absorbed  / released  /  it depends  ):  [blank2]            ii.  The sign of ΔE will be (positive  / negative  /  neither):  [blank3]   c.  What is the ground state electron configuration (use core notation with no spaces, e.g. ()? [blank4] d.   How many unpaired electrons are there in the ground state atom? [blank5] e.   Give one set of possible quantum numbers for an electron in a 3d orbital.           n = [blank6], l = [blank7], ml = [blank8], ms = [blank9]   Periodic Table

(WCSP25) Select all of the following that are true about the orbital with the following quantum numbers: n = 2,   

13. There are two isotopes of helium: helium-3 and helium-4.  3He is proposed to be a safer nuclear fuel compared to uranium and plutonium.   It has been suggested that the moon could be mined for helium-3. (WCSP[x], 9 points)  Table 1: Isotopes of helium and abundance on the moon. Isotope Mass abundance 3He 3.016 amu ? 4He 4.003 amu 3.66% a.  What is the percent abundance of helium-3 on the moon? b.  What is the average atomic mass of helium on the moon?  (show all work for full credit) c.  Given the atomic mass of helium on the periodic table, what isotope is more abundant here on earth?  Explain in a few words (no calculation).   Periodic Table Data Sheet Enter the value for part b in the box below.   

(WCSP25) Complete the table below ranking the examples according to the criteria given: smallest largest Atomic radius: C, O, S [blank1] [blank2] [blank3] Ion Size: K+, Ca2+, Cl- [blank5] [blank6] [blank7] Ionization energy: Na, Mg, K [blank9] [blank10] [blank11] Energy:  UV light, green light, microwaves [blank13] [blank14] [blank15]   Periodic Table

(WCSP25) What is the expected sign (+/-) of ionization energy ?  Explain why in just a few words. 

(WCSP25) Shown below are a series of interacting charged particles.  One pair is 1 unit of distance (denoted ‘d’) apart, another is 2d and the other 3d units apart.  Select the system that has the lowest electrostatic potential energy.   Data Sheet

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Garage Database Design (Part 1) — E/R diagram Instructions  You’re designing a database concerning a local garage. Fill in the blanks based on the E/R diagram for this database. To help visualize the structure, draw the E/R diagram on scratch paper. Entities Involved customer, vehicle, job, part  Given Information For each customer, we want to record the (unique) name, address, and contact phone number. For each vehicle, we want to record the unique vehicle’s identification number (VIN), and the vehicle’s make, model and year. For each repair job, we want to record the description of the job done (maximum 200 chars), the date, and the total dollar cost. A repair job may involve zero or more parts (like, e.g., battery, windshield wipers). For each part we want to record the unique part number, the part name and it’s cost. Additional Information Each vehicle have one or more repair jobs. Each customer can be primary owner of one or more vehicles. Every vehicle has only one primary owner. Each vehicle can have no more than one repair job in any given day. Fill in the Blanks Entity customer has attributes [customer_attr1]. has a [customer_rel_type1] relationship [customer_rel1] to [customer_str1] entity [customer_ent1]. Entity vehicle has attributes [vehicle_attr1]. has a [vehicle_rel_type1] relationship [vehicle_rel1] to [vehicle_str1] entity [vehicle_ent1]. has a [vehicle_rel_type2] relationship [vehicle_rel2] to weak entity [vehicle_ent2]. Entity job has attributes [job_attr1]. has a [job_rel_type1] relationship [job_rel1] to [job_str1] entity [job_ent1]. has a many-to-many relationship [job_rel2] to [job_str2] entity [job_ent2]. Entity part has attributes [part_attr1]. has a [part_rel_type1] relationship [part_rel1] to [part_str1] entity [part_ent1]. In the E/R diagram weak entity is represented by [diagram1]. the relationship between a weak entity and a strong entity is represented by [diagram2].