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
Hoochie [10]
3 years ago
5

A steam engine does 12 kJ or work in 55 s. how much power does the engine produce?

Physics
2 answers:
allsm [11]3 years ago
8 0

Answer:

Power, P = 218.18 watts

Explanation:

It is given that,

Work done by the steam engine, W=12\ kJ=12\times 10^3\ J

Time taken to do work, t = 55 seconds

Power produced by the engine is given by work done divided by time taken i.e.

P=\dfrac{W}{t}

P=\dfrac{12\times 10^3\ J}{55\ s}

P = 218.18 watts

Hence, this is the required solution.

Georgia [21]3 years ago
6 0
P=w/t
12kj=12000J
the answer is p=12000/55=218.18

You might be interested in
The intensity of the sound from a certain source is measured at two points along a line from the source. The points are separate
Artemon [7]

Answer:

The source is at a distance of 4.56 m from the first point.

Solution:

As per the question:

Separation distance between the points, d = 11.0 m

Sound level at the first point, L = 66.40 dB

Sound level at the second point, L'= 55.74 dB

Now,

L = 10log_{10}\frac{I}{I_{o}}          

I = I_{o}10^{\frac{L}{10}} = I_{o}10^{0.1L} = 10^{- 12}\times 10^{0.1\times 66.40} = 10^{- 5.36}      

L' = 10log_{10}\frac{I'}{I_{o}}

I' = I_{o}10^{\frac{L'}{10}} = 10^{- 12}\times 10^{0.1\times 55.74} = 10^{- 6.426}        

where

I_{o} = 10^{- 12} W/m^{2}

I = Intensity of sound

Now,

I = \frac{P}{4\pi R^{2}}

Similarly,

I' = \frac{P}{4\pi (R + 11.0)^{2}}

Now,

\frac{I}{I'} = \frac{(R + 11.0)^{2}}{R^{2}}

\frac{10^{- 5.36}}{10^{- 6.426}} = \frac{(R + 11.0)^{2}}{R^{2}}

R ^{2} + 22R + 121 = 11.64R^{2}}

10.64R ^{2} - 22R - 121 = 0

Solving the above quadratic eqn, we get:

R = 4.56 m

8 0
3 years ago
The diagram below shows a wave with its wavelength indicated in red.
lisabon 2012 [21]

C. It will decrease


5 0
4 years ago
Read 2 more answers
Find your mass if a scale on earth reads 650 N when you stand on it.
netineya [11]

Weight = (mass) x (gravity)

Acceleration of gravity on Earth = 9.8 m/s²

                                           Weight on Earth = (mass) x (9.8 m/s²)

Divide each side by  (9.8 m/s²):          Mass = (weight) / (9.8 m/s²)

                                                            Mass = (650 N) / (9.8 m/s²)

                                                           Mass = 66.33 kg  (rounded)
 
7 0
4 years ago
The unit of length most suitable for measuring the thickness of a cell phone is a
Elis [28]

centimeter or millimeter.

Explanation:

The unit of length most suitable for measuring the thickness of a cell phone is centimeter or millimeter.

Length refers to how long a material is.

  • There are different units of length.
  • Smaller units that are microscopic are used to measure length dimensions that are very small
  • For example, nanometre is used to express microscopic length values.
  • Centimeters and millimeters are used for small dimensions that we can easily see.
  • Longer lengths can take the order of a yard, kilometer, miles e.t.c

Learn more:

Length brainly.com/question/13035995

#learnwithBrainly

8 0
4 years ago
A 0.0208 m diameter coin rolls up a 18.0◦ inclined plane. The coin starts with an initial angular speed of 56.0 rad/s and rolls
anastassius [24]

Answer:

h = 0.0259 m

Explanation:

given,

diameter of the cone = 0.0208 m

                     radius,r = 0.0104 m

angle of inclination,θ = 18°

initial angular velocity, ω_i = 56 rad/s

final angular velocity ,ω_f = 0 rad/s

height, h = ?

Rotational kinetic energy

KE_r = \dfrac{1}{2}I\omega^2

Moment of inertia of coin

I = \dfrac{1}{2}MR^2

so,

KE_r = \dfrac{1}{4}MR^2\omega^2

Transnational Kinetic energy

KE_t = \dfrac{1}{2}Mv^2

v = r ω

KE_t = \dfrac{1}{2}MR^2\omega^2

now,

using conservation energy

Kinetic energy of the coin is converted into the potential energy  

KE_r + KE_t = PE

\dfrac{1}{4}MR^2\omega^2 + \dfrac{1}{2}MR^2\omega^2 = Mgh

\dfrac{3}{4}R^2\omega^2=gh

\dfrac{3}{4}\times 0.0104^2\times 56^2=9.8\times h

h = 0.0259 m

Vertical height gain by the coin is equal to 0.0259 m

7 0
4 years ago
Other questions:
  • A rod bent into the arc of a circle subtends an angle 2θ at the center P of the circle (see below). If the rod is charged unifor
    9·1 answer
  • One gram of salt in 100 liters of water could be considered a _______________________ solution.
    15·2 answers
  • 6. How would the measurements for potential difference and current change if a 200 Ω resistor was used in Circuit 1 instead of t
    10·1 answer
  • If water and oil don't mix together explain fully how did would interact​
    5·1 answer
  • People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in
    15·1 answer
  • An a.m. station has a frequency of 967 MHz what is the corresponding wavelength to this radio station
    6·1 answer
  • How much current will be flowing through a 40.0 m length of cylindrical metal wire with radius 4.0 mm if it is connected to a so
    12·1 answer
  • What happens to the object when positive velocity and positive acceleration occur?
    7·1 answer
  • 10.6. Go back to the original functions but change one of the minus signs to a plus sign (so now f(x,t) = 2.0*sin(x+t) and g(x,t
    5·1 answer
  • Explain the relationship between speed and distance, and velocity and acceleration.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!