A scientific investigation is replicable if A.
two different scientists perform different experiments in their own laboratories but they produce the same results.

B.
one scientist performs the same experiment in his or her own laboratory and different results are obtained.

C.
the same investigation is conducted in two different laboratories by two different scientists and the same results are produced.

D.
one scientist performs many different experiments in his or her own laboratory.

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.