WHY DOES EVERY IMAGE DOES NOT MAKE ON FOCUS ALWAYS we all know that light from a point go to different direction so there is possibility that few light will also travel parallel to each other and fall on concave mirror .from different point few light will travel also parallel, so why does not every image not made on focus in concave mirror

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n