you have a concave spherical mirror with a 11.7 cm radius of curvature. you place an object on the mirror's axis, 18.9 cm in front of the mirror. how far is the object's image from the mirror?

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

Which object is most likely represented by a dot?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.