Una fuerza P de 2.9 lb se aplica a una palanca que controla la ba­rrena de una barredora de nieve. Determine el valor de a si el momento de P respecto a A es en sentido contrario al de las manecillas del reloj y tiene

una magnitud de 17 lb • in.

La respuesta es: 49.9 o 59.4 grados.

Necesito el procedimiento.

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

When you turn on a battery-operated device, an electrical circuit is

Aperson touches a large chunk of ice with their hand and remarks, “this is making me cold.” explain what this person is feeling. is the ice transferring “cold” to the person? is there a heat transfer occurring? explain.