Determine the focal length of a concave mirror if: (a) with the distance between an object and its image being equal to 1-15 cm, the transverse magnification ? 2.0; (b) in a certain position of the object the transverse magnification is ? ? 0.50 and in another position displaced with respect to the 1s former by a distance l- 5.0 cm the transverse magnification p, - =-0.25

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

it is a negative acceleration

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.