A diver observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). The temperature at the bottom is 4.0° C, and the temperature at the surface is 23.0°C. Part A What is the ratio of the volume of the bubble as it reaches the surface to its volume at the bottom? Enter your answer numerically. ——| ΑΣΦ V₂ V₁ Submit Part B Request Answer Would it be safe for the diver to hold his breath while ascending from the bottom of the lake to the surface Submit ? No. This increase in volume of air in the lungs would be dangerous. Yes. This increase in volume of air in the lungs is safe enough for human body. Request Answer
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- Part 1: Bullet A 52 g bullet is fired from a height of 458 m. The initial speed of the bullet is 140 m/s. The bullet eventually comes to rest in a bucket containing 2.9 kg of olive oil that is at ground level. As a result of bringing the bullet to a stop (any change in PE while in the olive oil is negligible), how much does the temperature of the olive oil increase (express the answer in K)? Also determine how fast the bullet is going at impact. Ignore air drag and assume that all of the thermal energy generated goes into heating the olive oil. Impact speed = AT= Part 2: Nail A 0.52 kg hammer strikes a 28 g copper nail into wood board. The nail is horizontally aligned and at the moment of impact with the nail, the hammer had a speed of 8.9 m/s. Assume both the hammer and the nail come to a stop and that all of the thermal energy generated goes into heating the nail. Determine how much the temperature of the nail will increase after one hit and how many hits it will take to increase its…A surveyor has a stainless steel measuring tape that is calibrated to be 100.000 m long (i.e., accurate to ±1 mm) at 20°C. She needs to add the correction factor to get the true distance. Submit Correct Part B How large, in mm, is the correction factor? Express your answer in millimeters to two significant figures. ► View Available Hint(s) Previous Answers AL = 11 Submit VΠ ΑΣΦ Provide Feedback Previous Answers ? X Incorrect; Try Again; 14 attempts remaining mmA cylinder contains 0.250 mol of carbon dioxide (CO₂) gas at a temperature of 27.0°C. The cylinder is provided with a frictionless piston, which maintains a constant pressure of 1.00 atm on the gas. The gas is heated until its temperature increases to 127.0°C. Assume that the CO₂ may be treated as an ideal gas. Part A How much work is done by the gas in this process? Express your answer in joules. — ΑΣΦ W = Submit Part B On what is this work done? The work is done on the piston. The work is done on the cylinder. Submit Part C Request Answ AU = What is the change in internal energy of the gas? Express your answer in joules. ΑΣΦ Submit Request Answer Request Answer P Pearson W ? ? J J
- In a container of negligible mass, 0.300 kg of ice at an initial temperature of -25.0°C is mixed with a mass m of water that has an initial temperature of 80.0°C. No heat is lost to the surroundings. Part A If the final temperature of the system is 19.0°C, what is the mass m of the water that was initially at 80.0°C? Express your answer with the appropriate units. m = Submit μA Value Request Answer Units ? Reviewhow to do?7 of 13 At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is -59.0° C and the air density is 0.467 kg/m³. The molar mass of air is 28.8 g/mol. Part A What is the pressure of the atmosphere at that altitude? (Note: The temperature at this altitude is not the same as at the surface of the earth, so the equation Р— Ро ехp (- Mgy doesn't apply.) RT Express your answer with the appropriate units. HA ? Value Units Submit Request Answer
- A large cylindrical tank contains 0.750 m³ of nitrogen gas at 22.0°C and 6.50x103 Pa (absolute pressure). The tank has a tight-fitting piston that allows the volume to be changed. Part A What will be the pressure if the volume is decreased to 0.530 m³ and the temperature is increased to 165°C? Express your answer in pascals. —| ΑΣΦ P = Submit Request Answer < Return to Assignment Provide Feedback ? PaI am doing some practice problems to prepare for an exam and i cannot solve this problem, specifically part a but I would like to check this problem A piston cylinder device contains 0.8 kg of air initially at 100 kPa, 27 °C. The air is now compressed slowly in a polytropic process during which PV^1.3 =constant, until the volume reaches 1/2 its original volume. The system is then heated at constant pressure until the volume gets back to its original value. NOTE: THIS IS NOT A CYCLE. Data: Rair = 0.287 kJ/kg K; Cv=0.731 kJ/kg K; Cp=1.018 kJ/kgK. a) Determine the amounts AND directions of the Work and Heat(each in kJ) for each of the two processes. show all work used to get your values. b) Sketch the two processes on a P-v diagram, clearly showing all three state points and the two processes with their directions.part c
- An ideal gas at 20°C consists of 2.2 x 1022 atoms. 3.2 J of thermal energy are removed from the gas. Part A What is the new temperature in °C? Express your answer in degrees Celsius. DA ΑΣφ T = °C Submit Request AnswerAn open container holds 0.550 kg of ice at -15.0°C. The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 800.0 J/min for 500.0 min. Part A After how many minutes does the ice start to melt? Express your answer in minutes. —| ΑΣΦ t = Submit Part B Request Answer t = ? min After how many minutes, from the time when the heating is first started, does the temperature begin to rise above 0.0°C? Express your answer in minutes. —| ΑΣΦ ? Review | Consta minSubject: physics