An object that starts at a position of 5 m and travels for 3 seconds at a velocity of -9 m/s ends up at what position? 0 -22 m

O-4 m

0-13 m

0-27 m

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?

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.