15 kg object is moving downward at a speed of 20 m/s. If it is currently 3 m above the ground and the gravitational acceleration(g) is 9.8 m/s2 ca lculate the answer​

Because you ate playdough

Ahigh energy (high speed) particle (alpha or beta or neutron) are shot at the target;

The answer is the third choice

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.