9) El concepto" se produce cuando un cuerpo inicialmente electrizado toca a un cuerpo neutro". Corresponde a la definición de electrización por: a) Frotamiento

b) Contacto

c) Inducción

d) Polarización

10)

Para detectar la presencia de carga eléctrica, se suele utilizar un instrumento que consiste en una pieza de metal conectada con dos láminas que se encuentran al interior de un compartimiento de vidrio. Al tocar la pieza de metal con un cuerpo cargado, las láminas de metal se separan. Este instrumento es llamado:

a) Electroscopio

b) Telescopio

c) Voltímetro

d) Amperímetro

11) Un cuerpo posee un numero total de protones mayor que el numero total de electrones. Este cuerpo esta:

a) Electrizado positivamente

b) Eléctricamente neutro

c) Electrizado negativamente

d) Electrizado positiva o negativamente, dependiendo del valor de la carga del protón y del electrón

it becomes positively charged by charging it

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.