The apple is thrown vertically upwards with speed 3.0 m s−1. The knife is thrown with speed 8.0 m s−1.

When the knife and apple collide, they are both at the highest points of their trajectories.

At what angle from the horizontal, θ, was the knife thrown?

(You may ignore air resistance. Take the acceleration due to gravity to be 10 m s−2.)

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.

An object's buoyant force and weight mean the same thing.a. trueb. false

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.