If a document is to be produced using a duplicating camera, where should the camera be placed in or
der to obtain an exact copy? A. at the point which
is twice the focal lenght of the lens of the camera
B. at the optical centre of the lens of the camera C
between the principal and a point twice the foca
lens of the lens of the camera D. beyond a poin
twice the focal lenght of the lens of the camera​

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.

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

the ima (higher than 1m) will be greater than the ima with the height of 1m.