Homework 8, Problem 9: Suppose you have a device that extracts energy from ocean waves in direct proportion to their intensity. If the device produces 11 kW of power on a day when the waves are 1.15 m high, how many kilowatts will it produce when they are 0.575 m high? P2 = ______
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Homework 8, Problem 9: Suppose you have a device that extracts energy from ocean waves in direct proportion to their intensity.
If the device produces 11 kW of power on a day when the waves are 1.15 m high, how many kilowatts will it produce when they are 0.575 m high?
P2 = ______
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Solved in 2 steps
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- A 0.05 kg mass uses the potential energy of a spring in acquiring a speed of 0.4 m/s when the spring was decompressed from a distance of 0.1 meter. What is the total energy developed during the process if the spring constant is 0.5 N/m?Can you Explain what Ui and Uf is? is that potential energy?Ocean waves with a period of 16 s and a height of 2.5 m are incident on a region of coastline. If the wave energy can be converted into electrical energy with an efficiency of 15%, how much coastline would need to produce electricity that would replace the output of a 1000 MW coal fired power plant? Answer=34km
- Oliver uses a coiled spring on his daily exercise. If he requires 60 Newtons to compress the spring by 0.25meters, determine the following:a. The force constant of the spring.b. The force required to compress the spring to 0.50 meters.c. The potential energy when the spring is compressed to 0.50 meters.Suppose you have a device that extracts energy from ocean waves in direct proportion to their intensity. if the device produces 12 kW of power on a day when the waves are 1.45 m high, how many kilowatts will it produce when they are 0.675 m high?I have 72 lightbulbs in my house. 53 of these lightbulbs are 65 watt and the other 19 lightbulbs are 53 watt. I use the 65 watt lightbulbs an average of 10 hours a day and 53 watt an average of 12 hours a day. 1 kilowatt=1000 watts. Estimate the energy used during 1 year by all the lightbulbs in my home?
- In a sunny location, sunlight has a power density of about 1 kW/m2 . Photovoltaic solar cells can convert this power into electricity with 16% efficiency. If a typical home uses 390 kW⋅h of electricity per month, how many square meters of solar cells would be required to meet its energy requirements? Assume that electricity can be generated from the sunlight for 8 h/day .A 9 W led lightbulb emits the same light as a 60 W standard lightbulb. If a power company charges 10 cents per kW.h, then how much money do you save by using the led lightbulb instead of the standard lightbulb for 30 days? A 0.4 kg object is attached to a spring and is oscillating on a horizontal surface. When the object has a speed of 25 m/s, the spring is stretched 0.5 m. The spring constant is 200 N/m. Neglect friction. Find the total energy. Find the maximum speed of the object. Find the maximum stretch in the spring.The total consumption of electrical energy in the United States is about 1.0 1019 joules per year. What is the average rate of electrical energy consumption in watts? If the population of the United States is 300 million, what is the average rate of electrical energy consumption per person? The sun transfers energy to the earth by radiation at a rate of approximately 1.0 kW per square meter of surface. If this energy could be collected and converted to electrical energy with 40 % efficiency, how great an area (in square kilometers) would be required to collect the electrical energy used by the United States?
