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
Sidana [21]
3 years ago
13

NEED HELP PLEASE 15 POINTS PLEASEE NEED HELP

Physics
2 answers:
Ostrovityanka [42]3 years ago
5 0

Answer:

I wish I knew

Explanation:

Reil [10]3 years ago
5 0

Answer: The third one

Explanation:

You might be interested in
Potential energy can be converted into kinetic energy, a good example of this is when a pole-vaulter bends the pole during a lea
lesantik [10]

Answer:

The pole stores elastic potential energy when the pole is bent because its shape is change from its natural shape and it will want to go back to its original form, just like a spring or stretched elastic material.

Question:

Why did you lie about being in college?

6 0
3 years ago
Read 2 more answers
An engine absorbs 1.69 kJ from a hot reservoir at 277°C and expels 1.25 kJ to a cold reservoir at 27°C in each cycle.
Anna35 [415]

Answer

Given,

Energy absorbed, Q_H = 1.69\ kJ

Energy expels,Q_C =  1.25\ kJ

Temperature of cold reservoir, T = 27°C

a) Efficiency of engine

 \eta = \dfrac{Q_H - Q_C}{Q_H}\times 100

 \eta = \dfrac{1.69 - 1.25}{1.69}\times 100

\eta =26.03 %

b) Work done by the engine

 W = Q_H- Q_C

 W =1.69 - 1.25

 W = 0.44\ kJ

c) Power output

     t = 0.296 s

   P = \dfrac{W}{t}

   P = \dfrac{0.44}{0.296}

   P = 1.486\ kW

8 0
3 years ago
Indentify the 3 types of heat tranfer
Elenna [48]

Answer:

Heat is transfered via solid material (conduction), liquids and gases (convection), and electromagnetical waves (radiation).

Feel free to ask...follow me

8 0
3 years ago
Read 2 more answers
What is the amount of a certain isotope that occurs in a natural sample of an element?
svet-max [94.6K]

last answer better for question

6 0
3 years ago
Read 2 more answers
Personal ethics comes from a person's likes and dislikes true or false?
Artemon [7]
Personal ethics come from what you believe in as a person no what u or others like or dislike so ot would be false
5 0
3 years ago
Read 2 more answers
Other questions:
  • Given a force of 56N and an acceleration of 7m/s2, what is the mass?
    5·2 answers
  • What characteristic do the metals iron, nickel, and cobalt share?
    7·2 answers
  • What happens to white light when it passes through a prism
    11·1 answer
  • Is anyone in 9th grade or does anyone know what inertia is
    5·2 answers
  • a)Show that whennbecomes very large, the energy levels of the hydrogen atom are getting closer to energy.b)Are the rays of these
    8·1 answer
  • What is the difference between landforms and landmarks
    5·1 answer
  • N capacitors are connected in parallel to form a "capacitor circuit". The capacitance of first capacitor is C, second one is C/2
    11·1 answer
  • I agree to hire you for 30days. You can decide between two methods of payment: either (1) $1000 a day, or (2) one penny on the f
    8·2 answers
  • PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
    12·1 answer
  • You have to make it balanced.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!