Vector A points in the positive x direction and has a magnitude of 75 m. The vector C = A + B points in the positive y direction and has a magnitude of 95 m. (a) Sketch A, B, and C. (b) Estimate the magnitude and the direction of the vector B from your sketch.

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

Elements that have one valence electron and are very reactive are called