Question

A city gets its electricity from a dam, where water is stored in a reservoir. How does the water provide the city with its power?(1 point) Responses

Answer 1

Electricity is generated from water stored in a dam's reservoir by converting the water's potential energy into kinetic energy as it flows through turbines, which then generate electrical energy that is transmitted to the power grid.

Step-by-step explanation:

How Water from a Dam Provides Electricity

The process of generating electricity using water stored in a reservoir behind a dam is known as hydroelectric power. The stored water has potential energy due to its elevation. When the water is released, it flows through turbines, converting the potential energy into kinetic energy that spins the turbines. These turbines are connected to generators which transform the kinetic energy into electrical energy. The electricity produced is then transmitted to the power grid for use in the city. This method of power generation is considered renewable and efficient, often achieving up to 90% energy capture from the potential energy released by water.

In addition to energy production, reservoirs behind dams serve multiple purposes, including water supply for urban areas, flood control, and recreation; however, they can also have negative environmental impacts. These can include habitat disruption, interfering with fish migration, and the buildup of silt over time, which can reduce dam effectiveness.

Answer 2

(Question) A city gets its electricity from a dam, where water is stored in a reservoir. How does the water provide the city with its power?

(Answer) Potential energy in the water becomes kinetic energy as it moves through turbines, which turn kinetic energy into mechanical energy that spins a generator, which changes mechanical energy into electricity.

(Question) An acorn rolls off a roof and falls to the ground. Which statement best describes the change in energy?

(Answer) The acorn’s potential energy decreases as its kinetic energy increases.

(Question) An airplane carries 320 passengers from Phoenix to Los Angeles flying at an average speed of 490 miles per hour. On the return flight, the plane carries 164 passengers and travels at the same average speed. What happens to the plane’s kinetic energy?

(Answer) On the return flight, the plane has less kinetic energy.

(Question) A racehorse is running at 42 miles per hour, equivalent to 18.8 meters per second. The horse and its jockey have a combined mass of 512 kilograms. How much kinetic energy do they have?

(Answer) 90,480.6 J

(Question) Which object has kinetic energy?

(Answer) balloon rising in the sky

(Question) Mr. Starr pushed a cart full of groceries to his car. After emptying the cart, he pushed it back to the store. He pushed the cart at a speed of 2 meters per second each way. Which is the best prediction?

(Answer) When it was empty, the cart had less kinetic energy.

(Question) A student fires a toy rocket into the sky. When does the rocket have the most potential energy?

(Answer) when the rocket reaches its highest point

(Question) What is the best description of one billiard ball hitting a second billiard ball?

(Answer) Most of the kinetic energy in the first ball is transferred to the second ball.

(Question) A roller-coaster car is at the top of a hill. The car and its passengers have a combined mass of 1,088 kilograms. If the hill is 62 meters tall, how much potential energy does the car have?

(Answer) 661,068.8 J

(Question) A roller-coaster is at the top of a 62-meter hill. The car and its passengers have a total mass of 1,088 kilograms. By the time the car reaches the bottom of the hill, its speed is 74 miles per hour (33 meters per second). How much kinetic energy does the car have at the bottom of the hill?

(Answer) 592,416 J

(Question) A diagram is drawn showing a swing set with a swing pulled backward prior to release. The diagram shows how the swing will move forward and then backward after it is initially released. At which point in the diagram is all of the energy gravitational potential energy?

(Answer) when the swing is pulled back prior to release

(Question) essay

(Answer) good luck

(Question) essay

(Answer) good luck

Step-by-step explanation:

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