QUESTION 4 Cart A with a mass of 1 200 kg is towing cart B also with a mass of 1 200 kg with a tow rope as shown on the diagram below. They are moving across a rough horizontal surface, with a force of magnitude F. Ignore the mass of the rope. The coefficient of kinetic friction for the cart A and cart B, are 0,2 and 0,1 respectively. Right click on the button below to open the image in a new tab.   4.1 State Newton’s second law in words. (2) 4.2 Draw a free body diagram of all the forces acting on cart A. (5) 4.3 Calculate the tension in the string if the system accelerates to the right at 4 m.s-2.               (5) 4.4 Calculate the magnitude of the force F if the system moves to the right at constant velocity. (6)     [18]

Which of the following is an indication for invasive mechanical ventilation? 1. Respiratory Arrest 2. Impending Ventilatory Failure 3. Refractory Hypoxemia 4. Respiratory Failure

An ABG is obtained on patient on the following settings: PRVC Vt 500, RR 20, +5 and 100%. pH  7.37 PaCO2 39 Pa02 50 HCO3 24 Sa02 85% What is the cause of the patient’s abnormal ABG?

Which of the following half reactions is the correct representation of the balanced half-reaction for the following half-reaction?   Mg     —>  Mg2+  

What is the type of bonding in covalent / molecular compounds?

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Identify if the following half-reaction is an oxidation or a reduction reaction.   Fe3+  + 3 e-  –>  Fe 

Which of the following statements about how and why neutral atoms form ions is FALSE?

What type of chemical reaction does the following unbalanced chemical equation represent? LiClO3 —-> LiCl + O2

An unknown element, X, occurs naturally as three isotopes.  In a sample of this element, 28X has a mass of 27.977 amu and is 92.21% abundant in the sample, 29X  has a mass of 28.976 amu  and is 4.70% abundant in the sample and 30X has a mass of 29.974 amu  and is 3.09% abundant in the sample (1) Calculate the Average Atomic Mass (weighted average) of this element.  Report to proper number of significant figures and units.   SHOW WORK FOR IN ORDER TO EARN FULL CREDIT. HINT:  Set up a table like shown in the notes. (2)  What is the identity of this element?  HINT:  Use the average atomic mass and reference the Periodic Table.