Answer:
90
Explanation:
The mass number of the missing daughter nuclei can be obtained as shown in the attached photo.
Here
- Acceleration and initial velocities are constant.
According to first equation of kinematics.




- Time was t at velocity v
- Time will be 4t at velocity 4v
I think the answer is A
Explanation:
the bus has more kg than the car so. the bus need to stop first
The standard states of elements are the forms that they adopt at a temperature of 25°C and pressure of 1 atmosphere. These forms of the elements are the reactants in the formation equations of multi-element substances. The heat of formation (∆Hf°) of an element in its standard state is zero