A Railroad Train Travels Forward Along a Straight Track at 80.0

question 7

Multiple Choice

A railroad train travels forward along a straight track at 80.0 m/s for 1000 m and then travels at 40.0 m/s for the next 1000 m.What is the average velocity?

• A) 60.0 m/s
• B) 37.5 m/s
• C) 63.7 m/s
• D) 53.3 m/s

Comprehend the role of animals in ecosystems, including predation, symbiosis, and competition.

Understand the significance of scientific research and discoveries concerning animal biology, including medical and ecological applications.

Understand the unique structural and functional characteristics of sponges.

Identify the main groups of mollusks and their distinctive features.

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Definitions:

Hair Follicle

A dynamic organ located in the dermal layer of the skin, from which hair grows, and is a site for sebaceous glands and nerve endings.

Sebaceous Gland

A gland in the skin that produces sebum, an oily substance that helps to lubricate and protect the skin.

Epidermis

The outermost layer of skin, serving as a protective barrier against environmental threats and regulating water loss from the body.

Dermis

The thick layer of living tissue below the epidermis that forms the true skin, housing sweat glands, hair follicles, and blood vessels.