calcium levels in Mr. gallariani’s blood are dropping to dangerously low levels . the hormon PTH is released and soon blood calcium level’s begin to rise . shortly after ,PTH released slows. is this an example of a positive or negitive feedback mechanism ? what is the initial stimulus ?what is the result?
A 8.2420 g sample of an unknown hydrate of cobalt(II) bromide is heated until all the water of hydration is removed. The CoBr2 that remains has a mass of 6.2000 g.
Answer the Study Questions (attached)
you need to answer each question in one page. it’s 4 question and you should answer each one in one page single spaced.
And I have attached all the documents for answering the questions.
A scuba diver shines a flashlight from beneath the surface of water (n = 1.33) such … such that the light strikes the water-air boundary with an angle of incidence of 37 . At what angle is the beam refracted?
Which of the following statements about retinoic acid and its derivatives is false?
Select one:
a. A deficit of vitamin A can lead to fetal abnormalities.b. An excess of vitamin A can lead to fetal abnormalities.c. Retinoic acid acts by binding to key DNA sequences, resulting in the expression of faulty mRNA molecules.d. Retinoic acid acts as a roofplate signaling molecule.
Write a three to four paragraph summary of the older individual you researched earlier in the study section of the unit. (any older adult is fine)
Support your analysis with citations from the materials you located in your search and from the readings or texts.
Please remember, this is a discussion, but it is a scholarly discussion. As such, your posts should reflect having read and applied the course material. Your discussion posts (initial and peer response posts) should contain in-text citations and reference lists, and should follow APA style and format.
A 20,000 kg jet takes off from an aircraft carrier via a catapult. The jet’s engines exert a constant force of 136 kN on the jet. The force exerted on the jet by the catapult is plotted in Fig. 7-24b (see attachment) with F1 = 1200 kN and F2 = 73 kN. (a) Determine the work done on the jet by its engines during the launch of the jet.(b) Determine the work done on the jet by the catapult during the launch of the jet.A 20,000 kg jet takes off from an aircraft carrier via a catapult. Thejet’s engines exert a constant force of 136 kN on the jet. The forceexerted on the jet by the catapult is plotted in Fig. 7-24b with F1 =1200 kN and F2 = 73 kN.Figure 7-24(a) Determine the work done on the jet by its engines during the launchof the jet.(b) Determine the work done on the jet by the catapult during the launchof the jet.
A block of mass = 10.0 is attached to the end of an ideal spring. Due to the weight of the block, the block remains at rest when the spring is stretched a distance = 8.00 from its equilibrium length. The spring has an unknown spring constant . Take the acceleration due to gravity to be = 9.81 . What is the spring constant ?Express your answer in newtons per meter.
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