Physics Middle School

Hunter pushed a couch across the room. He did 800 J of work in 20 seconds.
The couch weighed 500 N. How much power did he have?
A. 16,000 W
B. 1.6W
C. 800 W
D. 40 W

Hunter Pushed A Couch Across The Room. He Did 800 J Of Work In 20 Seconds.The Couch Weighed 500 N. How

Answers

Answer 1

Answer:

[tex]the \: answer \: for \: this \: question \: is \: d.40w[/tex]

Explanation:

Greetings !

Given values Work(W)= 800Jtime(t) = 20 secondWeight = 500N

required value power(P) = ?

Solution:

Firstly, recall the work-power equation

work=power*timew=p*t

substitute known values to the equation

(800)=P*(20)

Solve, for P (power)

P=40.0w
Answer 2

Hunter had a power of 40 W while pushing the couch across the room. The correct answer is D. The correct answer is 40W.

Given:

Work (W) = 800 J

Time (t) = 20 seconds

Power is the rate at which work is done or the rate at which energy is transferred. It is calculated using the formula:

Power (P) = Work (W) ÷ Time (t)

Let's calculate the power:

Power (P) = 800 ÷ 20

Power (P) = 40 W

Therefore, Hunter had a power of 40 W while pushing the couch across the room. The correct answer is D.

To know more about the work and power:

https://brainly.com/question/19382734

#SPJ3

Related Questions

please help me with these two questions... thanks

Answers

19) C because the object is stationary, the forces are balanced in all directions so no work is being done and therefore no energy is being transferred

20) B because heating it transfers thermal energy and passing a current transfers electrical energy. I think that shining a light for long enough may heat the block up so it could be D but I’m not sure if that’s what it’s asking
The fist one should be C

Iron(III)oxide reacts with carbon monoxide to produce iron and carbon dioxide
- How many moles of iron (Fe) are produced from 1.8 moles of iron(III)oxide (Fe2O3)?
- Using your answer from the question above, how many molecules of iron is present in
that number of moles ?

Answers

Answer:

- 3.6 moles Fe

- 2.2 x 10²⁴ molecules Fe

Explanation:

First, you need to create the balanced chemical equation.

The unbalanced equation:

Fe₂O₃ + CO -----> Fe + CO₂

Reactants: 2 iron, 4 oxygen, 1 carbon

Products: 1 iron, 2 oxygen, 1 carbon

The balanced equation:

Fe₂O₃ + 3 CO -----> 2 Fe + 3 CO₂

Reactants: 2 iron, 6 oxygen, 3 carbon

Products: 2 iron, 6 oxygen, 3 carbon

Now that we have the balanced equation, we can use the mole-to-mole ratio (from the equation coefficients) to convert from moles Fe₂O₃ to moles Fe.

1.8 moles Fe₂O₃           2 moles Fe
--------------------------  x  ----------------------  =  3.6 moles Fe
                                     1 mole Fe₂O₃

We can convert between moles and molecules using Avogadro's Number.

Avogadro's Number:

6.022 x 10²³ molecules = 1 mole

3.6 moles Fe         6.022 x 10²³ molecules
---------------------  x  -------------------------------------  =  2.2 x 10²⁴ molecules Fe
                                           1 mole

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please help. thanks

Answers

I’d say B since a turbine transfers energy by moving and generators generate electrical energy
Your answer is B merengue method

Why does height affect bounce efficiency?

Answers

Because the height increases the speed over distance and time.

100 POINTS+BRAINLIEST: 8TH GRADE PHYSICS: “As an object moves away from the center of the earth, the force of gravity INCREASES OR DECREASES”? Any rude or “for points” answers will get reported. PLEASE HURRY !!!!

Answers

Answer:

Explanation:

Newton's law of gravitational force states that force of gravity is inversely proportional to the distance in between two bodies.

So As an object moves away from the center of the earth, the force of gravity DECREASES.

the gravity decreases
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