Explanation

When water waves pass from a deep region to a shallow region, they are refracted, which means they change direction.

The speed and wavelength of the waves also change, but the frequency remains constant.

Explanation

When the reaction quotient (Qc) is equal to the equilibrium constant (Kc), the system is at equilibrium and is stable.

Qc = Kc indicates that the rates of forward and reverse reactions are equal, and the concentrations of reactants and products remain constant.

Explanation

Minerals like gold salts (e.g., auranofin) and platinum compounds (e.g., platinum sulfate) have been used to treat rheumatoid arthritis.

Gold therapy, in particular, has been used for many years to reduce inflammation and alleviate symptoms.

Explanation

Genetic engineering, also known as genetic modification or biotechnology.

It is the artificial manipulation of DNA to alter the genetic code of an organism.

This can involve the transfer of genes from one organism to another, or the alteration of existing genes within an organism.

Explanation

Each mole of ATP (Adenosine Triphosphate) stores energy equivalent to:

• 7.3 kilocalories (kcal) per mole (approximately)
• 17.3 kilojoules (kJ) per mole (approximately)

Explanation

In a solid, the particles (atoms, molecules, or ions) are closely packed and vibrate in place, holding their position in the crystal lattice.

This vibration is due to thermal energy, and the particles oscillate around their fixed positions.

Key Points:

• In a gas, particles are widely spaced and move freely.
• In a liquid, particles are close together but move past each other.

Explanation

Limiting frictional force (also known as static friction) is greater than:

• Rolling friction (because rolling friction is much smaller, as it only opposes the motion of an object that is already rolling)
• Sliding friction (which is another term for kinetic friction)
• Kinetic friction (which is the frictional force that acts when an object is already moving)

Explanation

Significant figures (also known as significant digits) are the number of digits in a measurement or calculation that are known to be reliable and accurate, including the first doubtful digit.

For example, the measurement "23.4 cm" has four significant figures, while "23.40 cm" has five significant figures.

Explanation

Fish is an excellent source of protein.

It is essential for building and repairing muscles, organs, and tissues in the body.

Explanation

CH3-CH2-CH3 is the molecular formula for propane, which is a saturated hydrocarbon (an alkane).