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1) Calculate the Work done by a horizontal force of 75 N acting on a 40 kg mass over a distance of 80 m. Give the answer to 1 decimal place. 2) A force of 150 N is applied at an angle of 10 degrees to an object as it is pulled 20 meters horizontally in the +x direction. Calculate the work done by this force. Give the answer to 1 decimal place. 3) Calculate the kinetic energy of a 120 kg mass moving with velocity 18 m/s. Give the answer in 1 decimal place. 4) How much work is required to increase the velocity of a 20 kg mass from 16 m/s to 40 m/s? Give the answer in 1 decimal place. 5) Calculate the Work done by gravity when a 16 kg mass is raised from a height of 3m to 20m. Give the answer to 1 decimal place. 1) Calculate the Work done by a horizontal force of 75 N acting on a 40 kg mass over a distance of 80 m. Give the answer to 1 decimal place. 2) A force of 150 N is applied at an angle of 10 degrees to an object as it is pulled 20 meters horizontally in the +x direction. Calculate the work done by this force. Give the answer to 1 decimal place. 3) Calculate the kinetic energy of a 120 kg mass moving with velocity 18 m/s. Give the answer in 1 decimal place. 4) How much work is required to increase the velocity of a 20 kg mass from 16 m/s to 40 m/s? Give the answer in 1 decimal place. 5) Calculate the Work done by gravity when a 16 kg mass is raised from a height of 3m to 20m. Give the answer to 1 decimal place. 2) A force of 150 N is applied at an angle of 10 degrees to an object as it is pulled 20 meters horizontally in the +x direction. Calculate the work done by this force. Give the answer to 1 decimal place. 3) Calculate the kinetic energy of a 120 kg mass moving with velocity 18 m/s. Give the answer in 1 decimal place. 4) How much work is required to increase the velocity of a 20 kg mass from 16 m/s to 40 m/s? Give the answer in 1 decimal place. 5) Calculate the Work done by gravity when a 16 kg mass is raised from a height of 3m to 20m. Give the answer to 1 decimal place. Solution 1) work = force*dispalcement w = 75*80 = 6*10^3 J 2) w = fscos(theta) w = 150*20*cos10 = 2.9*10^3 J 3) k = 1/2mv^2 = 1/2*120*18^2 = 1.9*10^4 J 4) w = 1/2*20(40^2-16^2) = 1.3*10^4 J 5) w = 16*9.8(20-3) = 2.7*10^3 J .

Educação

Solution
1) work = force*dispalcement
w = 75*80 = 6*10^3 J
2) w = fscos(theta)
w = 150*20*cos10 = 2.9*10^3 J
3) k = 1/2mv^2 = 1/2*120*18^2 = 1.9*10^4 J
4) w = 1/2*20(40^2-16^2) = 1.3*10^4 J
5) w = 16*9.8(20-3) = 2.7*10^3 J

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Which is the stronger acid in the following pair- Explain your reasoni.docx

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Which is NOT true for solute retention? A) Retention time, t r, is the elapsed time between injecting the sample to the arrival of a sample component at the detector minus the dwell time between the end of the column and the detector. B) Adjusted retention time is t râ€™ = t r â€“ t m, where t r is the retention time and t m is the time for mobile phase or unretained solutes to pass through the column. C) The relative retention, ? = r 2 , is the ratio for the adjusted retention time for two t \' r1 components of the sample, where t r2â€™ > t r1â€™ so that ? > 1. D) The retention factor, k = t r ? t m , is the time, tr, required to elute a component t m K 1coefficients for components 2 and 1.minus the time, tm, for mobile phase to pass through the column divided by t m . E) The relative retention, ?, also equals K 2 , where K 2 and K 1 are the partition coefficients for components 2 and 1. Solution (A) is the answer. Reason: The absolute time taken by a compound to travel from the injector through the column to the detector is the retention time. Dwell time will not come into the definition. Rest all options are correct .

Which is NOT true for solute retention- A) Retention time- tr- is the.docx

jbarbara1

Which form type displays records in a tabular format similar to a Datasheet view but has more editing options, such as adding graphics? Datasheet Form Multiple Items Form Split Form Subform Which database property type increases the efficiency of a search on the designated field in the physical database? Validation rule Validation text Indexed Expression Which of the following describes a poor design consideration for a form? Arrange controls closely together or in a sequence that is easy to read by the user. Each form should have a different theme. Make labels descriptive and clear. Right-align labels followed by a colon and left-align bound controls. After running a query, which view will be shown? Datasheet Design Query Result A deletion anomaly is deleting facts about one entity successfully. deleting a table. deleting facts about one entity and deleting facts about another entity. deleting only one fact from a column. Solution 1) DataSheet Form It is a data entry form where we can display query result into tables. 2)Indexed Normally all data stored in database is indexed so that searching by integer index value is faster than searching whole data fields. Normally this search known as indexed search. 3)Right-align labels followed by a colon and left-align bound controls. 4) After running a query, the result shown in daraSheet view. 5)deleting facts about one entity successfully .

Which form type displays records in a tabular format similar to a Data.docx

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which equation best represents the net ionic reaction that occurs when an aqueous solution of barium iodide is mixed with an aqueous solution of lithium sulfate? No net reaction occurs Ba^2+(aq)+SO4^2-(aq)-> BaSO4(s) BaI2(aq)+Li2SO4(aq)-> BaSO4(s)+2LiI(aq) 2H^+(aq)+2I^-(aq)->2HI(g) Ba^2+(aq)+2I^-(aq)+2Li^+(aq)+SO4^2-(aq)-->BaSO4(s)+2LiI(aq) which equation best represents the net ionic reaction that occurs when an aqueous solution of barium iodide is mixed with an aqueous solution of lithium sulfate? No net reaction occurs Ba^2+(aq)+SO4^2-(aq)-> BaSO4(s) BaI2(aq)+Li2SO4(aq)-> BaSO4(s)+2LiI(aq) 2H^+(aq)+2I^-(aq)->2HI(g) Ba^2+(aq)+2I^-(aq)+2Li^+(aq)+SO4^2-(aq)-->BaSO4(s)+2LiI(aq) No net reaction occurs Ba^2+(aq)+SO4^2-(aq)-> BaSO4(s) BaI2(aq)+Li2SO4(aq)-> BaSO4(s)+2LiI(aq) 2H^+(aq)+2I^-(aq)->2HI(g) Ba^2+(aq)+2I^-(aq)+2Li^+(aq)+SO4^2-(aq)-->BaSO4(s)+2LiI(aq) Solution Ans Reaction between aqueous solution of barium iodide and lithium sulfate BaI 2 (aq) + Li 2 SO 4 (aq) -> BaSO 4 (s) + 2LiI(aq) From above reaction it is clear that formation of barium sulfate is solid i.e. in pure form so not participate in net ionic reaction So net ionic reaction is 2LiI(aq) -> 2 Li + (aq) + 2Cl - (aq) So last equation best to represent the net ionic reaction Ba 2+ (aq) + 2I - (aq) + 2Li + (aq) + SO 4 2- (aq) --> BaSO 4 (s) + 2LiI(aq) .

which equation best represents the net ionic reaction that occurs when.docx

jbarbara1

Which complex in the electron transport chain does not contribute to the proton gradient? Why not? Solution Ans - An electron transport chain ( ETC ) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H + ions) across a membrane. This creates an electrochemical proton gradient that drives the synthesis of adenosine triphosphate (ATP), a molecule that stores energy chemically in the form of highly strained bonds. The molecules of the chain include peptides, enzymes (which are proteins or protein complexes), and others. The final acceptor of electrons in the electron transport chain during aerobic respiration is molecular oxygen although a variety of acceptors other than oxygen such as sulfate exist in anaerobic respiration. The four complexes involved in electron transport chain are Complex II does not contribute to proton gradient in electron transport chain. This complex oxidizes succinate, which is produced in TCA cycle, and transfers electrons to ubiquinone. This complex is not associated with any proton gradient. .

Which complex in the electron transport chain does not contribute to t.docx

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where heat is transfer high in conduction or convection where heat is transfer high in conduction or convection Solution CONDUCTION-- Conduction is the transfer of heat between substances that are in direct contact with each other. The better the conductor, the more rapidly heat will be transferred. Metal is a good conduction of heat. Conduction occurs when a substance is heated, particles will gain more energy, and vibrate more. These molecules then bump into nearby particles and transfer some of their energy to them. This then continues and passes the energy from the hot end down to the colder end of the substance. CONVECTION-- Thermal energy is transferred from hot places to cold places by convection. Convection occurs when warmer areas of a liquid or gas rise to cooler areas in the liquid or gas. Cooler liquid or gas then takes the place of the warmer areas which have risen higher. This results in a continous circulation pattern. Water boiling in a pan is a good example of these convection currents. Another good example of convection is in the atmosphere. The earth\'s surface is warmed by the sun, the warm air rises and cool air moves in. Hence more heat is transferred by CONDUCTION because of the direct contact. .

where heat is transfer high in conduction or convection where heat i.docx

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Where do most college students exist on Maslow\'s hierarchy of needs? Be descriptive in your explanation of why... Please be orginial no articles or cut and paste what are your real thoughts! Thanks !! Solution I think that most college students exist between the Love and Belong and Esteem parts of the hierarchy on the pyramid. Many College students have achieved a sense of love and belonging through relationships wthi their friends and family.Â Â Students have made social connections by being members of sports teams, clubs, fraternities, sororities and other types of activities that help to achieve this pyramid level. At the same time, the need for belonging may become overcome other needs depending on the level of peer pressure. Also, college students have a need to feel respected and values by others. This spills into the Esteem layer of Maslow\'s hierarchy pyramid. Students will participate in a hobby, team or other organization to gain recognition of others. By doing this, students achieve a sense of value and acceptance from others. In some cases, there will be a need to achieve popularity or fame but this will not assist in achieving actual happiness as the sense of value and acceptance must really come from within the student .

Where do most college students exist on Maslow-'s hierarchy of needs-.docx

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