Marquen con una X la opción correcta. Luego justifiquen la elección en sus carpetas. Un balde en reposo cuelga de una cuerda, entonces podemos afirmar que: □ No posee energía. □ Su energía cinética es distinta de cero. □ Existe trabajo mecánico de alguna fuerza □ Ninguna de las anteriores.

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)