Barbara places an object in front of a mirror. the mirror produces an image that is inverted, real, and smaller than the object which kind(s) of mirror could barbara be using?
a convex, because concave and plane mirrors produce only virtual images.
b concave, because plane and convex mirrors produce only upright virtual images.
c concave or convex, because both types of mirrors produce images that are inverted and real.
d convex or plane, because both types of mirrors produc image that is smaller than the object.

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?