a 1 kg block oscillates on a spring with spring constant 20N/m at t=0s the block is 20 cm to the right of the equilibrium position and movin to the left at a speed of 100 cm/s determine the period of oscillation and draw a graph of position versus time

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

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