A roller coaster ride begins with a chain and motor. The cart carrying the people is pulled by the chain, powered by the motor, to the top of a tall hill and then let loose to coast down. The cart then continues to follow the track until it reaches the end. Kinetic energy is dependent upon the mass of the object and the speed of the object. At which point of the ride is the kinetic energy the greatest?

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How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Nucleic acid certain protein cell membranes certain carbohydrates

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla