An object is placed in front of a spherical mirror. A virtual image is formed behind the mirror at a distance of 10 cm. The image's height is 4 cm. The magnification is 0.5. what is the focal length

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

gas and liquid

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.