At a given instant the 10-lb block a is moving downward with a speed of 6 ft/s. determine its speed 2 s later. block b has a weight of 4 lb, and the coefficient of kinetic friction between it and the horizontal plane is μk = 0.2. neglect the mass of the cord and pulleys.

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?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Which of the choices are parts of an atom? select all that apply. a.) compound b.) electron c.) neutron d.) molecule e.) photon f.) proton g.) element