I have two problems and i need help please.. First one: A mass of 0.05KG of the air is heated at constant pressure of 2 bar until the volume is occupied is 0.0658 m^3. Calculate the supplied heat and the workdone if the initially temperature of the air is 130 C.?

The second and the last one: 1 KG of nitrogen is compressed reversibly and isothermally from 1.01 bar, 20 C to 4.2 bar. Calculate the workdone and the heat Flow during the process Assuming nitrogen to be a perfect gas and molar mass 28kg/kmol

The characteristics of groundwater is said to be: are weak turbiditya constant temperaturechemical composition and almost overall absence of oxygen.

Answer: a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same sign as the  -4.0  µc charge.======electricstatic force between two point charges  is given by    where k is coulomb's constant,  8.99×10⁹  n·m²/c², q₁ and q₂ are the point charges, and r is the distance between the two point charges.assign positive to q₁let q₁ =  6.0 µc, q₂ = -4.0  µc, q₀ represent the charge at the origin, and q₃ represent this new charge to place.the charge at the origin q₀ would experience the following force f₀₁ from q₁, with r = 6.0 m (note that 1  µc = 10⁻⁶ c)    the force from q₂    the force from q₃    the net force on the origin charge, q₀, has to be zero for no electrostatic forcehaving an equation where k and q₀ can be divided out of the equation will allow us to solve for q₃    isolating:     a charge of -1.0  × 10⁻⁴ c must be placed  at x = 26 m.the sign of the charge will be the same as the  -4.0  µc charge

Answerit decreases;