a body of mass 12kg hangs from a fixed point by a light inextensible string. A horizontal force is applied to the body such that the body is in equilibrium when the string Is inclined at 35⁰ to the vertical. Find, correct to 1 decimal place the horizontal force and the tension in the string. Take g=9.8m/s²​

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.