the three vectors A is 210m along the negative x-axis and B is 45° above positive x-axis and 180m, while C is 60° below negative y-axis and 110m find the magnitude and direction of the vector D which when you added to the three vectors will give a zero resultant​

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.