Compute your average velocity in the following two cases: (a) you walk 85.2 mat a speed of 2.24 m/s and then run 85.2 m at a speed of 3.73 m/s alonga straight track. (b) you walk for 1.00 min at a speed of 2.24 m/s and then run for 1.30 min at 3.73 m/s along a straight track. the position of an object moving along an x axis is given by x 3.181-4041? + 1.05 where x is in meters and in seconds. find the position of the object at the following values of (a) 15.0 2 , and (d) 4 s. (e) what is the object's displacement between 0 andt - 457 what is its average velocity from t - 2 stot - 4s?

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.