Explanation

• In a normal man, the average heart beat is 72 times per minute.
• But it may vary from 70-80 beats per minute.

Explanation

Calcium is crucial for:

• Building and maintaining strong bones and teeth
• Muscle function and contraction
• Nerve function and transmission
• Blood clotting and wound healing

Explanation

Because sound is just vibrating air, space has no air to vibrate and therefore no sound in a vacuum.

Sound waves below 20 Hz are known as infrasound.

Sound waves above 20 kHz are known as ultrasound

Sound waves transmit a medium such as a gas, liquid, or solid.

• The speed of sound in air is about 343 meters per second
• The sound travels at 1,481 m/s in water 
• The speed of sound in a vacuum is zero meters per second, 
  

Sh10-8-2023

Explanation

• Omnivores are animals that eat both plants and animals.
• They have adaptations that allow them to digest and extract nutrients from a wide variety of food sources, including fruits, leaves, insects, small animals, and even carrion.
• Examples of omnivores include humans, bears, pigs, chimpanzees, and raccoons.

Explanation

• The Earth is tilted at an angle of 23.5 degrees.
• This tilt is responsible for the changing of the seasons and the difference in the amount of sunlight reaching a given point on the surface during the course of a year.
• The tilt varies between 22.1 and 24.5 degrees in a cycle that averages about 40,000 years.

Explanation

• Rickets is a disease caused by a deficiency of Calcium and Vitamin D.
• It leading to softening of the bones in children.
• It can cause bowed legs, stunted growth, and skeletal deformities.

Explanation

• The average internal temperature of the human body is 37°C (98.6°F).
• Which is the normal body temperature range for a healthy adult.

Explanation

Vitamin D deficiency can cause Rickets, a disease characterized by:

• Soft and weak bones
• Skeletal deformities
• Stunted growth
• Increased risk of fractures

Explanation

In the Fahrenheit scale:

• The freezing point of water is 32°F
• The boiling point of water is 212°F

Explanation

In the Fahrenheit scale:

• The freezing point of water is 32°F
• The boiling point of water is 212°F