Which one of the following can produce maximume of power about 5KW? a. Solar b. Fuel cell c. Wind d. Geothermal
Q: The third floor of a house is 10 m above the street level. How much work is required to lift a 500…
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Q: Power is defined by? Choose all that apply. A. Rate of doing work. B. force / time C. work done /…
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Q: You eat a sandwich. Later that day, you walk up a flight of stairs. a. Describe how energy changes…
A: a. The sandwich contains energy in the form of chemical energy. When I ate the sandwich, this…
Q: How much work is done (how much energy is required) to accelerate a 1987.5 kg car entering the…
A: According to work-energy theorem work done is equals to changes in between Final kinetic energy and…
Q: Give another example/application of energy conversion. Discuss.
A: According to the law of conservation of energy , energy can neither be created nor destroyed , but…
Q: The statement that change in kinetic energy of a system is equal to the work done on the system by…
A: Concept used: Work done on a system is equal to difference of final and initial kinetic energy of…
Q: 85. What is work – energy theorem? a. It states that whenever work is done, energy changes. b. It…
A: The amount of work done by all the forces on a particle is equal to the change in kinetic energy.
Q: 6. Research the power of two different things and report back their power in watts Eg. An onland…
A: 6. Power is amount of energy transferred or converted per unit time. A solar panel can produces…
Q: Work is measured in the units of? Choose all that apply. A. Joules (J) B. Kilocaloie C.…
A: The international System of unit of work is joule. The symbol of joule is J. Joule is equal to the…
Q: What is the power in watts of a motor rated ¼ hp?…
A: Given: The power is 1/4 hp.
Q: 8. What is the kinetic energy of a 1200 kg car travelling 90 km/h?
A: Given: The mass of the car is 1200 kg. The speed of the car is 90 km/h.
Q: Match associated items - A. B. C. D. E.…
A: Terms given in left column : Power Physics unit of energy Physics unit of power Potential energy…
Q: 94. Which of the following is a unit of energy?* O a. W O b. kg m/s O c.J O d. m/s
A: Energy : Energy is defined as the capacity of doing work.
Q: 10) A floor polisher supplies an average of 1000W of power. If the floor polisher is used for 10…
A: Given: The average power is 1000 W. The time interval is 10 min.
Q: An object in a horizontal surface was moved by applying a constant force (in Newtons), F = 8î + 5ĵ.…
A: The force applied to the object is Object displaced distance to the right is d = 9 m
Q: The total energy required to move a 10-N block up a 25-degree incline for 10 meters is 500 Joule. A…
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Q: 6. A 2,500 kg airplane can accelerate on the runway from rest to 250 mph in 15 seconds. What is the…
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Q: . At the first stage of a roller coaster ride, the 1200kg roller coaster ends up 50 m above its…
A: Mass of the roller coaster(m)=1200kg Height(h)=50m
Q: 4. If it takes a 100-N force to lift one shovel full of snow up 1.5 m, how many shovels full could…
A: Solution:-Given thatForce (F)=100 NDisplacement (d)=1.5 mTotal energy (E)=28 kJ=28000 J
Q: 1. A water pump pumps out 2400kg of water per minute. (A) if water is coming out with a velocity of…
A: Given data: Mass of the water m=2400 kg Time t=1 min =60 s Velocity v=3 m/s
Q: Consider a lightbulb rated for a power of 20 watts. This lightbulb consumes a certain amount of…
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Q: Write any two practical examples of the law of conservation of energy?
A: Example 1: A simple example is dropping a cell phone on the floor. Initially the phone has…
Q: List some loads that you use in your household and identify the form of output energy.
A: LOAD- A load is an electrical instrument that consumes electrical power.
Q: The power expended applying a force of 50 Newtons to lift a bucket a distance of 2 meters in a time…
A: Given Weight of bucket ( w = mg) = 50 N height (h) = 2m Time taken = 2.5 s Power is defined as…
Q: When is kinetic energy largest? Why?
A: Introduction: Kinetic energy is defined as the energy of an object due to its motion.
Q: Calculate the work done when a 5.0 kg bag of apples is lifted 1.2 m off the ground. 13 c)…
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Q: 1. Energy 2. Joules A 3. Work C 4. Power E A. The units for work and energy. B. Stored or gained…
A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…
Q: State law of conservation of energy.
A: Statement of Law of conservation of Energy:The law of conservation of energy states that energy can…
Q: Create an example of the Law of Conservation of Energy
A: The law of conservation of energy states that energy can neither be created nor be destroyed. It can…
Q: 92. It is defined as the rate at which work is done. * a. Joule O b. Newton O c. Speed O d. Power O…
A: The work is defined as W=F→·d→ Here F→ is force and d→ is displacement. The force is F→=ma→ Here m…
Q: 11. You push down on a 4.0 N box against the floor for 2 minutes. How much work was done? How much…
A: The force applied, F=4 N The time for which the force is applied, t=2 min
Q: Describe a situation where an object is in motion but no physical work is being accomplished.…
A: Consider the situation where a person carrying a suitcase on his head and walking. Now for an…
Q: The actual power output of a wind turbine with an efficiency of 45% is 1250kw. The predicted output…
A: Given data, Efficiency is given η=45 %. Output power Pout=1250 KW.
Q: A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of…
A: Effect of job is same, but for creating effect time taken is different.
Q: - A moving object whose initial KE is 10 J is subject to a frictional force of 2 N that acts in the…
A: Given data: Initial kinetic energy (KEi) = 10 J Final kinetic energy (KEf) = 0 J Force (F) = 2 N…
Q: 29.) Which of the following best describes the type of energy that is stored in the food you eat?…
A: When we eat food, we get energy to do various activities within the day.
Q: A pump is required to lift 800 kg (about 200 gallons) of water per minute from a well 10 m deep and…
A: Given: Mass m=800 kg Depth h=10 m Speed v=20 m/s Time t=1 min Standard conversion used: 1…
Q: 3. Which is an example of potential energy? Why? a. Moving car b. Wind mills c. Skateboarding d.…
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Q: 40.) Power is the rate at which energy is transferred. work is the process of transferring energy…
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Q: Angela is an Olympic figure skater. At the end of her performance, she spun. Her weight is 53 kg,…
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Q: 4. An 800 N student runs up a flight of stairs rising 6 meters in 8 seconds. What is the average…
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Q: a person holds a 50 Newton object stationary for 10 seconds, 2 meters above the floor, what is the…
A: The work done is given as product of the force and displacement. W = F x d
Q: Choose all that apply to potential energy. A. Potential energy can be negative. B. Potential…
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