An ice cream truck is moving along at 20m/s (it's initial velocity.) It then speed up (accelerates) for 5 seconds at 8m/s^2. What distance would the truck travel in this time interval

The distance traveled by the truck is 200 m.

Explanation:

The expression for the equation of motion is as follows;

Here, u is the initial speed, t is the time, a is the acceleration and S is the distance.

According to the given problem, an ice cream truck is moving along at 20m/s (it's initial velocity.) It then speed up (accelerates) for 5 seconds at 8 meter per second square.

Calculate the distance.

Put u= 20 meter per second, t= 5 s and a= 8 meter per second square in the above expression.

S= 100+ 100

S = 200 m

Therefore, the distance traveled by the truck is 200 m.

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.

need to see circuit to get time constant