Science Homework Help. PHYS 205 MBM College Intro to Physics Questions
- While diving in Cancun, Mexico, where the seawater has a density of 1,015 kg/m3, Nana observed that her pressure meter device reading was 3.75 atm. The reading at sea level is the standard 1.0 atm. At what depth is she diving when the meter read 3.75atm?
2) (a) What is the rms-speed of the Nitrogen
molecules at 25 degrees Celsius?
= 32g/mol, = 28g/mol
(b) Calculate the average speed for Nitrogen at
25 degree Celsius.
(c) What is the average translational KE of a Nitrogen
molecule at 293 K?
3A) One (1) mole of an ideal gas receives an input of
360J of energy in the form of heat. The gas does
325J of work on its surroundings by expanding,
- Find the change in its internal energy.
- Using your answer from part a) calculate the
Pg.2
temperature change .
3B) An ideal gas is undergoing isothermal
processes. Constant temperature.
- What amount of heat Q is added to the gas so that the Gas does 5,030 joules of work on the environment.
- 0.5 moles of an ideal monatomic gas expands
adiabatically while doing 1,500 J of work on its surroundings. Calculate it temperature change.
4) (a) Calculate the work done by an ideal gas
undergoing an isobaric process. The pressure
of the gas is 4.8 x 10^5 Pa, The initial volume
is 4m^3. The final volume is 8m^3.
(b)What is the change in internal energy of
the gas if 4,000 kJ of energy is supplied?
5) An aluminum flagpole is 300 cm high.
(a) By how much does its length increase as the
temperature increases by 20 degree Celsius?
(b) What is the total length of the flagpole?
The coefficient of linear expansion for
aluminum is =
Alpha = 24 x 10^(-6)/degree Celsius.
6) 0.5 kg of hot water at 98.6 degree Celsius is
poured into a 0.18 kg glass bowl initially at 25
degrees Celsius. What will be the common final
temperature of the water and bowl when
equilibrium is reached?
