Power in wind is proportional to what power of wind velocity? Second First Fourth Third

Q: Power is defined as the energy used divided by the work the work done times the distance of motion…

A: According to question we need to define power .

Q: The unit of power used in industry is A) Joule B) Watts C) Horse power D) Kilowatts

A: Power: Power is defined as the measure of the rate at which work is done. Power =Energytime Units of…

Q: Niagara Falls in New York state has a vertical drop of 48 meters. The hydroelectric dam uses this…

A: Given, Vertical drop h = 48 m Volume flow = 2455 m3/s    As the water drop from some height so the…

Q: Energy.gov stated by the end of 2013, the United States’ wind power capacity provided enough…

A: Capacity of electricity generated by wind power = 16 million homes  Capacity of electricity used =…

Q: It is estimated that 7x10kg of water pours over the Niagara falls every seconds.if the falls are 50m…

A: Potential energy stored due to mass m at height h is; P=mgh Here, g is acceleration due to gravity.…

Q: If a source of energy such as a solar power plant provides 1 gigawatt of power, many joules is that…

A:

Q: A 70- kg man can store about 120000  kcal of energy as fat. How far could such a man run on this…

A:

Q: Assume a laptop uses 50 watts per hour if the laptop is used for 8 hours a day how many kilowats or…

A: A regular laptop uses about 50 watts of power per hour. When used for 8 hours a day, the total power…

Q: According to the World Energy Council, the average household in Mexico consumes about 1600 kWh of…

A: Dimension of solar panels=(1×1)  So area of solar panel=1 m^2 Annual solar energy potential of panel…

Q: Suppose a person eats 2000 Kcal per day. Using the facts that 1 Kcal is approximately 4.2 Kj (a…

A: Joule is unit of energy or work. And Watt is the unit of power, which is energy per unit time. So,…

Q: Energy comes in many forms and is constantly being converted from one form to another. Identify the…

A: The objective of the question is to identify the form of energy that can be directly converted from…

Q: Electric utility companies generally say that a community with 65,000 homes needs to be served by a…

A:

Q: Which of the following describes advantages of geothermal power? I. Plants require some electricity…

A: The correct option is (a) i.e.,  It reduces green house gases.

Q: What is the power output of a kitchen blender that performs 3750 joules of work in 15 seconds?

A:

Q: For a wind energy conversion system, which of the following statement is correct? O wind power…

A: Required : What does wind power depend on.

Q: In a sunny location, sunlight has a power density of about 1 kW/m2 . Photovoltaic solar cells can…

A: The input power given to a solar cell is given by the equation,…

Q: Andrea just won a gold medal for weightlifting in olympics. Her weightlifting record was 127 kg.…

A: Weight distribution play important role in weightlifting. 1245 N weight is might be distributed such…

Q: Which of the following is NOT a unit of energy? hp kW-h calorie ft-lb Btu

A:

Q: Identify the five ultimate primary sources of useful energy

A: The main five primary sources of the energy are,

Q: Suppose a woman eats a 340 kcal cup of yogurt. How many minutes will the energy in the cup of yogurt…

A: The equation for the available energy or the output energy.

Q: A new coal-burning power plant can generate 1:5 gigawatts (billion watts) of power. Burning 1…

A: Given data: Energy generate = 1.5 GW Need to determine the energy generate in one month.

Q: Airflow lifts a 3.6 kg bird 50 m up. How much work was done by the flow?

A: The energy possessed by an object when raised to a height h from the ground is known as the…

Q: On what basis would you classify energy sources as(a) renewable and non-renewable?(b) exhaustible…

A: (a)The energy sources which can be restored or regenerated are called renewable source of energy,…

Q: 6. What is the potential energy stored in a cubic meter of water (1000 kg) that is in a reservoir…

A: Given: The mass of the water inside the reservoir is 1000 kg. The height of the reservoir is 60 m.

Q: What is the average power consumption in watts of an appliance that uses 8.18 kW · h of energy per…

A: The average power consumption is given by Where E = Total energy used, t = total time taken

Q: If a person consumes 2000 Calories (kcal) per day, how many watts of power can they generate,…

A: Answer:-  Given  Energy consume (E) = 2000 kcal  ( 1 kcal = 4184 J )  E = 2000 × 4184 = 8368000 J…

Q: Suppose a man does 34 kJ of work with an efficiency of 5.05 %. How much food energy, in…

A: Write the given values with the suitable variables. W=34 kJη=5.05%=0.0505Here, W is the work done…

Q: A small space heater uses 1,212 Watts of power. What does it cost in dollars to use the heater for…

A: Given: The power is 1212 W. The number of the days is 30 days. The run time of the heater is 14.7 h…

Q: VA child and a sled with a combined mass of 50.0 kg slide down a frictionless slope. If the sled…

A: law of conservation of energy states that the total energy of an isolated system remains constant.

Q: Describe three forms of energy utilized by a common machine (i.e. airplane, lawnmower, washing…

A: Form of energy: Chemical, electrical, radiant, mechanical, thermal, and nuclear energy are the six…

Q: The label on a candy bar says 400 Calories.  Assuming a typical efficiency for energy use by the…

A:

Q: 20. How many liters of oil would be needed to supply all of the world's energy needs for one year?

A: Solution:-             Energy released by 1…

Q: If the energy conversion efficiencies in a 3 step process are 30% for the first step, 40% for the…

A:

Q: A wind turbine has following data: Blade Length I = 50 m, Wind Speed v = 16 m/s and Air Density =…

A: Given Blade length = 50m Area = πr2 = π(25m)2 = 1963.5m2 Speed = 16m/s Air density = 1.225 kg/m3

Q: _______________is the energy stored in any deformed system that obeys Hooke’s law. a. Elastic…

A: For a given deformed system that obeys Hooke's law,d discuss type of  the energy stored in the…

Q: The energy of a system is conserved, provided there are no energy transfers between the system and…

A: the energy is conserved provided that there are no energy transformation between the system and the…

Q: A water fountain uses 125 Watts of power each hour. It is run 24 hours each day for 7 days. If…

A: The formula for the amount of energy consumed by the fountain is:

Q: A certain damn generates 120 MJ of mechanical hydroelectric energy each minute if the conversion…

A: Let us solve the problem step by step :Given that , Mechanical Energy=120 mJminChange MJsec to…

Q: What are 3 ways energy is converted into other forms of energy in our everyday regular lives?

A: According to law of Conservation of energy the total energy doesn't change, it can only be…

Q: In recent years, there has been a large push for an increase in the use of renewable resources to…

A: i) The mileage of the car, which use gasoline as fuel, is 27.5 mi/gal. ie., using 1 gallon of…

Q: Why are solar power and wind power somewhat unreliable?

A: Solar power is unreliable because the energy from the sun is only available during the day time so…

Q: s 1 pound of coal to generate one kWh of electricity. How much coal would an average home use in a…

A: in India average use of electricity per day = 5.7 Kwh / day  1 pound of coal to generate one kWh of…