A project of certain space organization had to fire a rocket for some reason. If the desired position of rocket while flying is at an altitude of 15 km where the temperature is – 50°C and speed of the rocket has to correspond with Mach number 2, find the speed of the rocket. Take K = 1.4 and R = 287 J/kg °K. %3D
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- Through questionable means, you have acquired 5.10 m3 of glycerin. In an attempt to sell it, you transport it outside under the hot Sun, where it warms up from 68.8 °F to 88.0 °F. By how much does its volume increase? Express your answer in m3 to three decimal place precision.After eating a 200 g pottle of yoghurt, a person decides to go for a run to burn off the extra energy. The yoghurt provides 5.4 MJ kg−1, and he is able to raise his metabolic rate to 220W while running. How long does he have to run?a) What is the magnitude of energy (in MJ) that must be removed to freeze 377 L of water with a density of 999.8 Kg/m3 that is already at 0˚C [round your final answer to one decimal place]? {latent heats of water: Lf = 33.5 × 104 J/kg, and Lv = 22.6 × 105 J/kg} b) The magnitude of energy that must be added to melt the same mass of ice (already at 0˚C) would be greater than the amount of energy that had to be removed in order to freeze it. TRUE OR FALSE {latent heats of water: Lf = 33.5 × 104 J/kg, and Lv = 22.6 × 105 J/kg}
- D-E please!23.0 g of copper pellets are removed from a 300 degree C oven and immediately dropped into 100 ml of water at 25 degree C in an insulated cup . what will the new water temperature be? express answer in degree CA 53−kg person drinks5.4×102g of milk, which has a caloric value of approximately 3.0 kJ/g.If only 17 percent of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? Enter your answer in scientific notation. Hint: The work done in ascending is given by mgh, where m is the mass (in kg), g is the gravitational acceleration(9.8 m/s2), and h is the height (in meters).
- A 42 client with a body mass of 74 kg is interested in jogging on the treadmill as their primary means of exercise, while they listen to their "pump-up" music playlist that lasts exactly 28 minutes. To be sure they get the recommended volume of exercise each week, you'd like to have your client burn 350 kcal in each jogging session. To achieve this, what should your client set as the treadmill speed while running, in miles per hour?A woman expends 95 kJ of energy in walking a kilometer. The energy is supplied by the metabolic breakdown of food intake and has a 35 percent efficiency. If the woman drives a car over the same distance, how much energy is used if the car gets 8.8 km per liter of gasoline (approximately 20 mi/gal)? The density of gasoline is 0.71 g/mL, and its enthalpy of combustion is 49 kJ/g. Enter your answer in scientific notation. Compare the efficiencies of the two processes. kJ (driving)/ kJ (walking)450g of water is heated in a pot from 22°C to 62°C. The water has a specific heat capacity of 4190 J/kg*K. What is the amount of thermal energy/heat transferred to the water to increase the temperature?
- When it rains, water vapor in the air condenses into liquid water, and energy is released. (a) How much energy is released when 0.0318 m (1.25 inch) of rain falls over an area of 2.59×106 m² (one square mile)? (b) If the average energy needed to heat one home for a year is 1.50x1011 J, how many homes could be heated for a year with the energy determined in part (a)? (a) Number (b) Number i i Units Units >Q11You blow up a spherical balloon to a diameter of 59.0 cm until the absolute pressure inside is 1.10 atm and the temperature is 22.0 °C. Assume that all the gas in N₂ is of molar mass 28.0 g/mol. Part A Find the mass of a single N₂ molecule. Express your answer in kilograms. m = Submit Part B K= 15. ΑΣΦ Submit Request Answer How much translational kinetic energy does an average N₂ molecule have? Express your answer in joules. 15| ΑΣΦ ? Request Answer kg ? J Re