Suppose you are 80 cm from a plane mirror. what area of the mirror is used to reflect the rays entering one eye from a point on the tip of your nose if your pupil diameter is 6.7 mm ?

area = 3.5238 × m²

Explanation:

Given data

distance = 80 cm

diameter = 6.7 mm

to find out

area of the mirror

solution

we know that by similar triangles

diameter of the spot is use by mirror

so

we calculate radius by diameter is 6.7 mm

so radius = 6.7 /2 = 3.35 mm

radius = 0.00335 m

so

area = πr²

area = π(0.00335)²

area = 3.5238 × m²

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.