Help please ! Which nucleotides form an RNA molecule?

Choose all that apply:

1) Adenine (A)
2) Uracil (U)
3) Thymine (T)
4) Cytosine (C).

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?