A block of mass m is initially at rest on a frictionless horizontal plane surface. At time t = 0, a decreasing force given by F = Foe-at is applied on the block, where a is a constant. Find the expression of the position x(t) of the block as a function of time.

Answer detailly 7(iii)

QUESTION 8 "Slow neutrons" are characterized with energy of 10 MeV O 10 ev 0.025 ev 1.0eV

Watch Th X T Take Test X Answerec x momentu X joules to X Convert j X| frequenc x tps://learning.ulster.ac.uk/webapps/assessment/take/launch.jsp?course_assessment_id%=_88723_1&course_id3_324733 1&new_attem QUESTION 1 code: 002 Answer the following questions about the hydrogen atom e. v the energy of the ground state |the energy required for electron to jump from ground state to excited state, n=3 |the energy required to ionise an electron v the value in Joules of 1 electron-volt (eV) a. 13.6 eV b.3.4 eV C. 12.09 eV d. 13 6 eV e. -3.4 eV f -12.09 eV g. 1.6E-19J QUESTION 2 code: 003, A electron is in excited state n = 5. How many different ways can it return to the ground state? O a.8 O b.7 OC5 Od 4 Oe 3 QUESTION 3