1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Setler79 [48]
4 years ago
13

A man performed 500 J of work moving a couch in his living room. It took him 10 seconds to move the couch. What was his power? 

A. 50 W  B. 490 W  C. 5000 W  D. 100 W
Physics
1 answer:
trasher [3.6K]4 years ago
7 0

Answer:

A. 50 W

Explanation:

Power = work / time

P = 500 J / 10 s

P = 50 W

You might be interested in
What is the specific heat of water?
Sergeeva-Olga [200]

Answer:

A) 4.18 J/g°C

Explanation:

8 0
3 years ago
Read 2 more answers
What does it mean to say that scientific models are open to change?
Natalija [7]

Answer:

B

Explanation:

4 0
3 years ago
Read 2 more answers
a closed systems internal energy changes by 178 j as a result of being heated with 658 j of energy. the energy used to do work b
Akimi4 [234]
<h3><u>Answer;</u></h3>

= 480 Joules

<h3><u>Explanation;</u></h3>

We use the formula, Q - W = ΔU

Where, Q = Heat transferred to the system

W = Work done by the system

ΔU = Change of internal energy.

As per the question, Q = 658 J

ΔU = 178 J

Thus, W = Q - ΔU = (658 - 178) J = 480 J.

The energy used to do work by the system is 480 J.

7 0
3 years ago
What is the quality of the sound of a fire truck’s siren when it moves toward a stationary hearer?
Doss [256]
<span>What is the quality of the sound of a fire truck’s siren when it moves toward a stationary hearer?
Its High Pitched

</span>

What is the quality of the sound of a fire truck’s siren when it moves away from a stationary hearer?

Its Low Pitched

6 0
3 years ago
Read 2 more answers
Select ALL that apply. The stages of a human's lifespan include:
Alex787 [66]

Answer:

The answers are A and C

Explanation:

the order of a humans lifespan is: Infancy, early childhood, adolescence, adulthood, then elderly

6 0
3 years ago
Read 2 more answers
Other questions:
  • How does wire thickness affect the power of the electromagnet?
    5·1 answer
  • An object weighs 55.54 newtons. What is its mass if a gravitometer indicates that g = 9.83 m/s2?
    10·1 answer
  • You decide to ride your bike for 30 minutes, raising your heart rate to the middle of your target heart rate zone. What type of
    7·2 answers
  • PLEASE HELP WILL GIVE 10 POINTS!!!!
    13·2 answers
  • Which of the following would decreasethe resistance to the flow of an electric current through a body? 
    5·2 answers
  • Why do solid have fixed shape?
    7·2 answers
  • A rope pulls a 82.5 kg skier at a constant speed up a 18.7° slope with μk = 0.150. How much force does the rope exert?
    13·1 answer
  • A plane's average speed between two cities is 625 km/hr. If the trip takes 2.5 hours, how far does the plane fly?
    8·1 answer
  • How was the theory of plate tectonics developed?
    9·1 answer
  • What is the avergae percent increase in the count rate over the voltage range of the geiger tube plateau?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!