A4.00 kg stone is dropped from a height of 145 m. what is the stone’s potential and kinetic energy respectively when it is 50.0 m from the ground?

a - 1,960 j, 5,680 j

b - 5,680 j, 1,960 j

c - 3,720 j, 1,950 j

d - 1,960 j, 3,720 j

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n

Carbon 14 is a naturally occurring stable

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.