Why is ice skating possible? Be specific and use the appropriate thermodynamic terms in your answer.
Why is ice skating possible? Be specific and use the appropriate thermodynamic terms in your answer.
031 10.0 points You want to enlarge a skating surface so you stand on the ice at one end and aim a hose horizontally to spray water on the schoolyard pavement. Water leaves the hose at 1.7 kg/s with a speed 41 m/s. If your mass is 62 kg, what is your recoil acceleration? Neglect friction and the mass of the hose. Answer in units of m/s2
The following table provides the specific heat and enthalpy changes for water and ice Substance Specific heat [J/(g⋅∘C)][J/(g⋅∘C)] ΔHΔH (kJ/mol)(kJ/mol) water 4.18 44.0 ice 2.01 6.01 a) Calculate the enthalpy change, ΔHΔHDeltaH, for the process in which 42.3 gg of water is converted from liquid at 3.2 ∘C∘C to vapor at 25.0 ∘C∘C . For water, ΔHvapΔHvapH = 44.0 kJ/molkJ/mol at 25.0 ∘C∘C and CsCsC_s = 4.18 J/(g⋅∘C) J/(g⋅∘C) for H2O(l)H2O(l). Express your answer to three significant figures and include the...
A young ice skater with mass 35.0 kg has fallen and is sliding on the frictionless ice of a skating rink with a speed of 20.0 m/s. a. What is the magnitude of her linear momentum when she has this speed? Express your answer with the appropriate units. b. What is her kinetic energy? Express your answer with the appropriate units. c. What constant net horizontal force must be applied to the skater to bring her to rest in 6.00 s?...
Is it possible to create a buffer with NH3 and HCl as your starting materials? If your answer is no, explain why a buffer is not possible. If your answer is yes, which species would need to be in excess? Why? In either case, explain your reasoning with the use of a chemical equation.
Please show ALL WORKING (NEATLY if possible) for the following question. Use ICE or IRACE tables as appropriate Give K expressions and an equilibrium equation. You will receive NO POINTS for simply writing down random numbers or just an answer. Upload a PDF of your working. What is the concentration of free Osmium(II) (Os2 (aq) ions in the solution below once it reaches equilibrium? Initially 0.042 M Os(HCO, and 0.110 M NHẠCH K [Os(NH2CH3)4]? = 1.2 x107
Why would a monopolist not charge the highest price possible? Include appropriate terminology that supports your reasoning
Explain the difference between the thermodynamic and kinetic control in the alkylation of substituted ketones Use appropriate examples with relevant intermediates to explain your answer 21
The constants for H2O are shown here: Specific heat of ice: sice=2.09 J/(g⋅∘C) Specific heat of liquid water: swater=4.18 J/(g⋅∘C) Enthalpy of fusion (H2O(s)→H2O(l)): ΔHfus=334 J/g Enthalpy of vaporization (H2O(l)→H2O(g)): ΔHvap=2250 J/g Part A How much heat energy, in kilojoules, is required to convert 73.0 g of ice at −18.0 ∘C to water at 25.0 ∘C ? Express your answer to three significant figures and include the appropriate units. 6.56 kJ is incorrect.
Why are water molecules less dense in ice than in water? Specific heat Van der Waals forces Hydrogen bonding Ice floats Which of the following are properties of water molecules? Select all that apply. Cohesion Surface tension Capillary action Adhesion
Take your two largest tables (in terms of columns) and create a data dictionary. Use appropriate data types and lengths for your attributes. Create DBMS data Dictionary