Explanation

• In a parallel circuit, each branch has its own path for current to flow.
• If one branch is interrupted, the other branches will continue to operate normally.

Explanation

Thermal energy can be transferred through all three methods:

• Conduction: Direct transfer between particles in physical contact.
• Convection: Transfer through the movement of fluids.
• Radiation: Transfer through electromagnetic waves (e.g., light, radio waves).

Explanation

In most businesses and homes, electrical circuits are connected in parallel to ensure that:

• Each device receives the same voltage
• If one device fails or is turned off, others remain operational
• The entire circuit doesn't fail if one device is disconnected

Explanation

• Whales have a unique audible range that is adapted to their underwater environment.
• They can hear sounds at very low frequencies, often below 20 Hz, and up to 31 kHz.

Explanation

• Sound travels slowest in air, with a speed of approximately 343 meters per second (m/s) at 20°C.
• This is because air is a gas and has a low density and stiffness, which allows sound waves to propagate more slowly through the material.

The speeds of sound in different materials:

• Air: 343 m/s
• Water: 1433 m/s
• Wood: 3300-3600 m/s
• Brick: 4176 m/s
• Steel: 6100 m/s
• Diamond: 12000 m/s

Explanation

• The number shown above the symbol of an element is called the atomic number (Z).
• It represents the number of protons in the nucleus of an atom.

Explanation

• Asexual reproduction is a type of reproduction where only one parent is involved, and offspring are produced without the fusion of gametes (sex cells).
• This means that the offspring are genetically identical to the parent.

Explanation

• Cross-Pollination is the transfer of mature pollen grains from the anther of one flower to the stigma of a flower on another plant of the same or different species.
• This means that the pollen is transferred between different plants, allowing for genetic diversity and increased fertility.

Explanation

• Transpiration is the process by which water is transported through the plant and evaporates from the aerial parts.
• Such as leaves, stems, and flowers, primarily through small openings called stomata.

Explanation

Root hairs are tubular outgrowths of root cells that increase the surface area for absorption of water, salts, and minerals from the soil.