Combustion of a rocket engine involves the reaction between hydrogen and oxygen. This releases 242 kJ of heat into the environment. If the initial energy was 17 kJ and the final energy was 494 kJ, how much work was done? Was this work done to or by the system? Be sure to show all of your work and include the correct units.
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- 2.10 You may have seen children play- ing in the summer with large- capacity water "soakers" shown schematically in the figure to the right. The air compartment of volume 750 cm³ is first manually pumped to P = 2.5 bar (absolute); its temperature is initially 30 °C. air tank v Dished high bot trigger 3 water pump When the trigger is pressed, the compressed air expels the water through a 2 mm diameter tube at a velocity of 8 m/s. Estimate the temperature and pressure in the air reservoir after 5s of operation. Air can be considered an ideal gas with Cy=5R/2. You may neglect the presence of water in the vapor phase. State any additional assumptions.It is 102 Fahrenheit. What is the temperature in Celsius temperature? Show your work.A toy uses a spring to launch projectiles. If the spring has a spring constant of 80 N/m and is compressed a distance of 0.04m, how high in the air could it launch a 0.003-kilogram projectile? Show your work.
- Need help with part D! ThanksComplete the specific latent heat calculations below. Remember that 1 kg energy absorbed = mass × specific latent heat. 1,000 g and 1. 30 g of ice is put into a glass of water. The specific latent heat of fusion for ice is 330,000 J/kg. Calculate the energy required to melt all of the ice.the answer is shown in the picture I just need the show work for this question please and thank you
- the illustration below shows the individual cones of depression that would result if either well A or B were pumping at 50 gmp for 4 hours (alone). In those conditions, the drawdown at point C would be 5 feet. How much drawdown would occur at point C if BOTH wells were pumping at 50 gmp for 4 hours at the same time? s = Q/4πT T= Q/4πs Please show all work. note: the answer should be "s=10"The power of an electrical device can be calculated using the following formula: v2 P = R where P is the power measured in watts, Vis the electric potential ('voltage') measured in volts, and R is the resistance measured in ohms. Part (a): Calculate the power of a hair dryer that has a resistance of 14 ohms and operates at 120. volts. Show your work, and ensure that each numeric value has the appropriate units. Your answer should be rounded to the appropriate number of significant digits. Part (b): Watts, volts, and ohms are Sl units that can be expressed in the 'base' SI units as follows: kg-m2 kg-m2 kg-m2 watt = s3 volt ohm s3.A ' s3.Ą2 ' (Recall that 'A' is the abbreviation for an ampere.) Use algebra and the equation at the top of the page (P=V/R) to show that the base Sl units for watts equal the base Sl units for volts?/ohms. You do not need any numbers in this algebraic exercise. Instead, treat each of the base SI units (kg, m, s, A) as if it were an algebra variable (like x or…