Explanation

The centripetal force (F) acting on the roller coaster is given by the formula:

F = (m × v^2) / r

Where:

m = net mass of coaster + passengers

v = velocity = 30 m/s

r = radius of the circular track = 30 m

Substituting the values, we get:

F = (m × (30)^2) / 30

= (m × 900) / 30

= 900m / 30

= 900m

So, the centripetal force acting on the roller coaster is 900m.

Explanation

The resistance of a semiconductor with a rise in temperature decreases.

This occurs because increasing temperature provides more energy to charge carriers.

It allowing them to move more freely and conduct electricity better.

Explanation

Phenol is less acidic than carboxylic acids.

Because carboxylic acids can stabilize their conjugate base through resonance and inductive effects, whereas phenol has less stabilization for its conjugate base.

Explanation

In the SN2 mechanism, the C-X bond breaks and the C-Nu bond forms simultaneously in a single concerted step.

It involving a backside attack by the nucleophile and inversion of configuration at the carbon center.

Explanation

The female reproductive system consists of all of the following EXCEPT seminiferous tubules.

Seminiferous tubules are part of the male reproductive system and are involved in sperm production.

Explanation

The main function of the epididymis is to transport sperms.

It also stores and matures sperm, ensuring they are ready for ejaculation.

Explanation

1 kilowatt-hour (kWh) is equivalent to 3.6 million joules (MJ).

As it represents the energy used when 1 kilowatt of power is consumed for 1 hour.

Explanation

The induced current will flow in such a direction so as to oppose the cause that produces it is the statement of Lenz's Law.

This law reflects the principle of conservation of energy in electromagnetic induction.

Explanation

Intermolecular forces between molecules of an ideal gas are considered absent.

As ideal gases are defined by the assumption that their particles do not attract or repel each other.

This allows them to occupy space independently and move freely.

Explanation

To turn the cloudy solution into a clear solution, adding HCl is the correct choice.

The addition of HCl shifts the equilibrium to the left.

It promoting the formation of BiCl₃ and reducing the concentration of BiOCl.

It is responsible for the cloudiness.