An object has an acceleration of 18.0 m/s/s. If the mass of this object were halved (I. e, reduced to one half the original value) (with no change in its net force), then its new acceleration would be m/s/s.

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?

Could someone . i have tried to solve myself but my calculation is off

What is the relationship between the direction of motion of the balloon and the wind currents