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Efficiency
Page 5
Questions (268)
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 24% 24% 60% 60%
1 answer
asked anonymously
20 views
Efficiency of the machine is75%. If the work output is 450J what is the work input
1 answer
asked by
Richlove
14 views
Short sentence with the word organized
1 answer
asked anonymously
15 views
By focusing on , you increase the advertising efficiency of your business.
1 answer
asked anonymously
23 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)
(1 point) • a car
1 answer
asked anonymously
25 views
Use the table to answer the question.
Machine Output Work (J) Input Work (J) A B C D 750 1,000 450 3,000 1,500 4,000 600 5,000
1 answer
asked anonymously
25 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work? (1 point)
80% 24% 60% 32%
1 answer
asked anonymously
26 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)(1 point) Responses a
1 answer
asked anonymously
19 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point) Responses 24% 24% 60% 60%
1 answer
asked anonymously
14 views
3. Explain the 80/20 principle in identifying key tasks with examples.
1 answer
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9 views
If an electric motor uses 50 kJ of energy to do 46 kJ of work, how efficient is it?
1 answer
asked anonymously
17 views
Part A: What is the efficiency of a simple machine if it puts out 400J of energy for every 1320J done on the machine? Leave your
5 answers
asked anonymously
26 views
Why can a machine not achieve 100% efficiency in the real world?
Machines make the work it takes to do a job harder. Machines
3 answers
asked anonymously
25 views
If a machine requires an input of 6000 J of work to put out 5000 J of work, what is the machine's efficiency?
a 100% b 120% c 40%
1 answer
asked by
e
20 views
Calculate the efficiency of a machine that produces 800J of work for every 2000J of work placed into the machine, and show your
1 answer
asked by
anonymous
13 views
A rotating space heater used 1,400 joules of energy while heating a room. Of that total, 896
joules produced thermal energy, 181
1 answer
asked anonymously
32 views
Ronald pushes a box up an inclined plane with 35% efficiency. If 224 joules of energy went
into moving the box, how much energy
1 answer
asked anonymously
18 views
One air fryer for sale uses 239 Joules of energy to cook a meal and has an efficiency of 80%. How much energy will be used to
1 answer
asked anonymously
22 views
A man is using a pulley to raise a weight. He is applying 45 joules of energy to pull on that rope and 44.325 joules of energy
ar
1 answer
asked anonymously
32 views
A pulley system is operating at only 50% efficiency. How could the efficiency be increased? (1 point)
Responses by reducing the
1 answer
asked anonymously
10 views
Like most inventors, Morse was interested in finding ____________________ and more effective ways to complete tasks.
A. slower B.
1 answer
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12 views
An engineer measures the energy consumed by an appliance and compares it with the useful energy put out by the appliance
1 answer
asked anonymously
12 views
Is it possible for the Efficiency to be greater than 100%? Why or why not?
1 answer
asked by
uyth
17 views
If an electric motor uses 50 kJ of energy to do 46 kJ of work, how efficient is it?
1 answer
asked anonymously
25 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)(1 point)
a car that
1 answer
asked anonymously
20 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 80% 80% 60% 60%
1 answer
asked by
uyth
30 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)(1 point)
Responses a
1 answer
asked anonymously
14 views
Use the table to answer the question.
Machine Output Work (J) Input Work (J) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000 5,000
2 answers
asked anonymously
26 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 24% 24% 60% 60%
1 answer
asked anonymously
16 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)(1 point)
Responses a
1 answer
asked anonymously
12 views
Question
Use the table to answer the question. Machine Output Work (J) Input Work (J) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000
1 answer
asked anonymously
15 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 24% 24% 80% 80%
1 answer
asked anonymously
7 views
A team of students builds a lever as a science project. They expend 10, 300 Joules of energy to lift some bricks with the lever.
1 answer
asked anonymously
19 views
Which car has the greatest efficiency?(1 point)
Responses a 900 kg car that travels 20 km per liter of fuel a 900 kg car that
1 answer
asked anonymously
14 views
made more efficient train locomotives
1 answer
asked anonymously
5 views
Analyze how railroad services became more efficient over time
1 answer
asked by
coocoocun
6 views
Which machine has the highest efficiency? (1 point)
a car that traveled 70 kilometers on 5.0 liters of gas a car that traveled 50
1 answer
asked anonymously
10 views
I certainly your system is only 30% efficient. What can make it more efficient
1 answer
asked anonymously
6 views
By using a pulley system, a farmer makes it easier to lift bales of hay by reducing the force needed. The energy she uses to
1 answer
asked anonymously
11 views
Can a machine ever be 100% efficient? Why or why not?
1 answer
asked anonymously
6 views
Why are incandescent light bulbs considered to be lower efficiency than LED bulbs
1 answer
asked anonymously
16 views
In which situation did the car achieve the greatest efficiency? (Assume the cars all have the same mass.)(1 point)
Responses a
1 answer
asked anonymously
12 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 32% 32% 80% 80%
1 answer
asked anonymously
4 views
Efficient transportation and fast communication systems are most beneficial in which of the following categories?(1 point)
1 answer
asked anonymously
17 views
What technology was the key to the efficiency of Gutenberg’s printing press?
(1 point) Responses strong roller strong roller
1 answer
asked anonymously
41 views
Use the table to answer the question.
Machine Output Work (J) Input Work (J) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000 5,000
1 answer
asked anonymously
10 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 32% 32% 24% 24%
1 answer
asked anonymously
8 views
A certain lever system is only 30% efficient. What could make it more efficient? (1 point)
Responses Make a longer lever that
1 answer
asked anonymously
8 views
Use the table to answer the question.
Machine Output Work (J) Input Work (J) A 750 1,500 B 1,000 4,000 C 450 600 D 3,000 5,000
1 answer
asked anonymously
24 views
What is the efficiency of a ramp if 2,000 joules of energy results in 1,200 joules of work?(1 point)
Responses 60% 60% 32% 32%
1 answer
asked anonymously
12 views
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