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- A bolt hole in a brass plate has a diameter of1.21 cm at 19.62°C. What is the diameter of the hole when the plate is heated to193.44°C? (The coefficient of linear thermal expansion for brass is 19 × 10-6 /C°.) a. 0.0052581 b. 1.2140 c. 1.2103 d. 0.006960763.0 L of oxygen at 21.0°C and an absolute pressure of 2.55atm are compressed to 38.3L and at the same time, the temperature is raised to 53.0°C. What will the new pressure be? P= atm1. a) A man weighing 765 N is on a bed of nails. Calculate the pressure exerted by each nail if there are 1,000 nails and each tip has a radius r = 0.500mm (5.00 x 104 m). b) Calculate the pressure exerted on the skin by acupuncture needle of radius r = 0.100mm (1.00 x 10 m) applied with a force of 3.00 N. Ans. a. 9.74 x 10³ Pa b. 1.59 x 108 Pa [Note that the Coletta text uses N/mm², which is a needless use of non-SI units.]
- 1. Given 14.00 L of a gas at a pressure of 5.10 atm, what will the volume be if I increase the pressure to 10.50 atm while keeping the temperature constant? 2. Given an initial pressure of 500. atm and a temp. of 150C, what will the pressure be if I increase the temp. to 275⁰C, while keeping the volume constant? 3. Given an initial volume of 20.5 L and a temp. of 50.0 ⁰C, what will be the new volume if the temp. increases to 100 ⁰C, while keeping the pressure constant?If 23.5 moles of an ideal gas occupies 0.0465 cubic meters at 14.5 °C, what is the pressure of the gas? pressure: PaThe temperature of a 63 g sample of an unknown substance is raised from 28° C to 86° C when 390 calories of heat are added . What is the specific heat of the sample , in cal/g . C ? Enter your calculated value to the nearest .001 cal/g . C .
- I need the answer as soon as possibleA hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a. If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.A thermos contains 160 cm3 of coffee at 93.2 °C. To cool the coffee, you drop two 10.5-g ice cubes into the thermos. The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treat the coffee as if it were water.