43) A projectile is fired at an angle Theta to the vertical. Its horizontal range will be maximum when Theta is

44) A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly

45) A thief stole a box full of jewelry of W kg and while carrying it on his head jumped down from third storey of the building. Before he reached the ground, he experienced a load of

46) According to which law, all perfect gases change in volume by 1/273rd of their original volume at 0 degree centigrade for every 10 degree centigrade change in temperature when pressure remains constant

47) Which of the following is the property of a system?