A 15 mm tall object is placed 20 cm in front of a concave spherical mirror of focal length f. The image produced by the mirror is upright and is 45 mm tall. The value of f is

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

which three statements are true about all alloys?

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it