9.for the following questions, use a periodic table and your atomic calculations to find the unknown information about each isotope: you have an neutrally charged isotope with a mass number of 99 and an atomic number of 43. how many protons? 99 43 56 142

Asailboat is traveling to the right when a gust of wind causes the boat to accelerate leftward at 2.5m/s2 for 4s. after the wind stops, the sailboat is traveling to the left with a velocity of 3.0m/s. assuming the acceleration from the wind is constant, what was the initial velocity of the sailboat before the gust of wind? answer using a coordinate system where rightward is positive.

Which statement is true about an object that is moving in a circular motion due to centripetal force, f, when the radius of its circular motion is doubled? the new force then becomes equal to 2f the new force then becomes equal to f the new force then becomes equal to f/2 the new force then becomes equal to f2 the new force then becomes equal to 1/f

What would be the net charge of 1 gram gold piece after removal of 1% of its electrons