Which of the following is not a type of system?

Biomedical

Ecological

Social

Biological

(not sure if this is physics but it doesn't give me the option to pick science for subject)

If a transformer doubles its input voltage, what is the current in the secondary coil if the primary coil is 10 A.

What would occur if the index of refraction of a material was less than n=1? The speed of light would increase to a speed larger than the maximum speed of light in a vacuum. The light wave would not bend at all though the material.

If an electric circuit is not grounded, it is best to reach out and touch it to provide the ground

Can we use a copper wire instead of eureka wire

If we increase the distance traveled when doing work, and keep all other factors the same, what will happen? A) The amount of force will go down B) The amount of force will increase.

The sun generates both mechanical and electromagnetic waves. Which statement about those waves is true? The mechanical waves reach Earth, while the electromagnetic waves do not.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

How does the role of blood protect the body

What is the objects velocity if the momentum is 6.0 kg•m/as

Which of the following scientists did not support the wave motion of light? A. Fresnel B. Maxwell C. Newton D. Arago