Cuando un objeto como un peine de plástico se carga por frotamiento con una tela, la carga neta, por lo general, es de unos cuantos microcoulombs. Si esa carga es de 3.0 uC. ¿Cuál será la carga de los papelitos que atrae el peine si la fuerza eléctrica es de 5 Newtons y la distancia que los separa es de 2 cm?
Si triplicamos la distancia, cuál será el nuevo valor de la fuerza eléctrica

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

What is the mass of the same rock on the earth

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.