4. Suppose there is a well and you would like find out how deep it is. You are given a stop watch and a small stone, will you be able to find out the depth of the well? Explain the procedure and find out a) the depth of the well is the time you get is 2s b) final velocity of the stone

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.

Matter that emits no light at any wavelength is called