Si una esfera metàl·lica sense càrrega neta es toca amb un altre objecte amb càrrega negativa, aquest en cedeix a l’esfera, és a dir, passen electrons d’aquest objecte a l’esfera. Així, tots dos cossos queden carregats negativament . Quin fenomen d’electrització s’està descrivint?

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.

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

Which of the following best describes the circuit shown below?