The assembly consists of a brass shell (1) fully bonded to a ceramic core (2). The brass shell [E = 96 GPa, 17.4 × 10−6/°C] has an outside diameter of 53 mm and an inside diameter of 33 mm. The ceramic core [E = 260 GPa, 3.5 × 10−6/°C] has a diameter of 33 mm. At a temperature of 14°C, the assembly is unstressed. Assume L = 300 mm. Determine the largest temperature increase that is acceptable for the assembly if the normal stress in the longitudinal direction of the brass shell must not exceed 71 MPa.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

a.   mass number from atomic number

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft