riana

the mass number of an element is 18 it contains 7 electrons what is the number of protons and neutrons in it what is atomic number of an element.

a car starts from rest , attains a velocity of 36kmph with an acceleration of 0.2m/s^2 travels 9km with this uniform velocity and then comes to halt with a uniform acceleration of 0.1m/s^2 find the total time of travel of the car.

a bullet initially moving with a velocity 20m/s strikes a target and comes to rest after penetrating a distance 10cm in the target calculate the retardation/deceleration caused by the target.

1 a boy was employed on the understanding that he was to receive 'p' paise for everyday he worked and 'q' paise for everyday when there was no work for him after 'd' days his total earnings amounted to rupees x how many days had he worked

Why is it expected that 2/10 of the ejected electrons will cone from the n=1 shell, and 8/10 ofthe electron from the n=2 shell?

a small airplane is dropping a probe in a remote area in antarctica in a narrowly specified location. the probe in a protective shell can not land any harder than with a maximum speed of 60m/sec at landing, while the plane has to move at a minimum speed o...