An acrobatic airplane performs a loop at an airshow. the centripetal acceleration the plane experiences is 14.7 m/s2. if it takes the pilot 45.0 seconds to complete the loop, what is the radius of the loop? round your answer to the nearest whole number.

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?

What are the three ways that an object can accelerate

Hydrogen and helium are both members of?