O incintă de volum V = 10 -2 m 3 conţine ν = 2 moli de azot (μ = 28 . 10 -3 kg / mol ) la temperatura t= 27 0 C. Determinaţi: a. Masa de azot exprimată în kg ; b. Masa unei molecule de azot; b. Densitatea azotului din incintă; c. Presiunea gazului din incintă.

If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)