Name two machines that have made life more accessible in the past 200 years. What could be considered disadvantages of using these machines?

Q: A form of energy that permits human eye to see.

A: The only one form of energy exists which permits human eye to see is light energy.

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: when was the electric elevator invented (smaller and more practical for taller buildings).

A: The first electric elevator was invented in 1889 by American inventor and engineer Werner von…

Q: What is the kinetic energy of a car that is traveling at 18.6 m/s if it has a mass of 1,240 kg?…

A: Given Mass of car m = 1240 kg speed of car v = 18.6 m/s

Q: The electric field is zero everywhere except in the region 0<x<7.00 cm, where there is a uniform…

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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: q 0.100 m -3.00 nC y + 112 6.00 nC. +

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Q: 3. Here is a problem that beautifully illustrates why we want this new approach. Problem: A mass of…

A: The given information is, mb=3 kgθ=60°μk=0.2si=0.5 m The free-body diagram of the system is as shown…

Q: A high-end gaming PC's most power-consuming component is... How much power can it produce at its…

A: In this question we have to answer which is the most power consuming part of the PC. Please give…

Q: A small gasoline‐powered car weighs 1100 kg. The rear seating weighs 34 kg. How much energy and…

A: GIVEN Weight of the gasoline powered car = 1100 kg rear seating weighs 34 kg Lifetime of the car =…

Q: 250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is…

A: Given: Effort, P = 250 N Mass, m = 75 kg Distance travelled by effort = 12 m Distance travelled by…

Q: how much energy needed to kick a football of mass 500 gm with the velocity 72 km/hr

A: Given,        mass of the football = 500g =0.5 kg        velocity of foot ball = 72 km/hr…

Q: If you have an object with a mass of 45.54 grams, and it is moving at a speed of 3.5 m/s, what is…

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Q: What is the kinetic energy of a 4 kilogram cat runnig at 5 m/sec ?

A: given that,mass of cat, m=4 kgvelocity of cat, v=5 ms

Q: A Honda Civic does 778,825 Joules of work to accelerate from 0 to 60 mph in 5.8 seconds.  How much…

A: Given data: The work done is W=778825 J The time is t=5.8 s

Q: What is known as grand free energy ?

A: The grand potential is a quantity used in statistical mechanics, especially for irreversible…

Q: If you had two shoes, an ordinary shoe and an "antishoe" made of antiparticles, and you annihilated…

A: Consider that US population at this moment is 328.2 million. If each of them has a weight of 600N,…

Q: 20. An example of cogeneration is: ✓ (a) operating a nuclear generating plant located beside a…

A: Cogeneration It is methods of utilization of remaining heat in thermal power plant after water…

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: Suppose a theme park roller coaster has a train with six carriages. Each carriage takes eight…

A: The number of time roller coaster loads is N=60min-3min60smin30s=114times

Q: What is sustainable energy?

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Q: 6. For one of the trials, calculate the change in position during each 5 second interval. (Average…

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Q: n the future pennies have become obsolete and a new type of furnace is invented that converts the…

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Q: Please rework the solution in a different way. I don't understand it

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Q: demonstrates a direct energy transfer? demonstrates a direct energy transfer? When the traffic…

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Q: A clothes dryer uses 3000 W and is run fro 1 hour. If the total useful energy to dry the clothes is…

A: Given: Power of the dryer P= 3000 W  time to use dryer = 1 hour  Total useful energy to dry the…

Q: Why machines are never 100% sufficient

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Q: Solar Impulse 2 is a Swiss long-range experimental solar-powered aircraft project. What are the key…

A: Solar Impulse is the name of the project's two operating aircraft, as well as a Swiss long-range…

Q: What are the historical and social origins of service (in technology ) ? B) Differences between…

A: Answer (A) :-  Technology—broadly understood as material artifacts or assemblages of artifacts used…

Q: Practice 1. A person cutting a flat lawn pushes a lawnmower with a force of 125 N at an angle of…

A: Given value--- Force = 125 N. angle = 40 degree  horizontal displacement = 12m. We have to find---…

Q: a hydraulic catapult propels the car to the top of the ride, at a height of 450 ft. If the car and…

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Q: The Laptop consumes 0.71 kWh of energy in one day. What is the average power consumption of this…

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Q: 4) You are planning to design a rocket to go to mars. You have access to two types of fuel with the…

A: As comparison with fuel A and B, the denser fuel A gives more energy as comparison with B. Like if…

Q: A 55kg load is suspended on the end of a cable, the other end of which is wound around a drum of…

A: (a) Given: The mass of the load is 55 kg. The diameter of the drum is 500 mm. The torque output of…

Q: a) What is the instantaneous failure rate at 18000 cycles? b) What is the average failure rate after…

A: In order to answer these queries, we want to initial calculate the mean cycle-to-failure (CTF) and…