Which of the following is one way that the base ammonia (NH3) is used? a: to keep swimming pools free of algae
b: in many beverages
C: as a dietary supplement
D: in many household cleaners​

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

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.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?