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
beks73 [17]
3 years ago
13

What is the power when a crane lifts a piece of pipe from the ground to a certain height, doing 15000 J of work in 25s?

Physics
1 answer:
egoroff_w [7]3 years ago
5 0

Answer: Option B) 600 W

Explanation:

Since power is the rate of work done per unit time

i.e Power = work/time

Given that:

power of a crane = ?

work done by crane = 15000 J

Time = 25 seconds

Power = 15000J / 25s

Power = 600 watts

You might be interested in
On Friday, September 28, 2018, Palu, Indonesia, on the island of Sulawesi, experienced an earthquake that generated a tsunami. F
Naily [24]

Answer: Proximity to active volcanoes

Explanation:

When volcanoes erupt, they can generate tsunamis in the following ways:

-Parts of the volcano (some of them may be underwater) could collapse, generating a big displacement of water and resulting in a tsunami.

-The magma chamber could also collapse as it empties, also generating water displacement.

-If the volcanoes are near to the shore, debris resulting from the eruption could hit the water at fast speeds, producing big waves and eventually a tsunami.

In this case, the proximity of Palu city to active volcanoes, especially ones that are so close to the shore, increases the risk of a tsunami.

7 0
3 years ago
Even when shut down after a period of normal use, a large commercial nuclear reactor transfers thermal energy at the rate of 150
Sever21 [200]

Answer:2.89\approx 2.9^{\circ}C/s

Explanation:

Given

Power\left ( P\right )=150 MW

mass of core\left ( m\right )=1.60\times 10^5 kg

Average specific heat \left ( C\right )=0.3349 KJ/kg^{\circ}C

And rate of increase of temperature =\frac{\mathrm{d}T}{\mathrm{d} t}

Now

P=mc\frac{\mathrm{d}T}{\mathrm{d} t}

150\times 10^6=1.60\times 10^5\times 0.3349\times \frac{\mathrm{d}T}{\mathrm{d} t}

Thus \frac{\mathrm{d}T}{\mathrm{d} t}=[tex]\frac{1.60\times 10^5\times 0.3349}{150\times 10^6}

\frac{\mathrm{d}T}{\mathrm{d} t}=2.89\approx 2.9^{\circ}C/s

6 0
3 years ago
Respond to the following based on your reading.
padilas [110]

Answer:

I would love to help but I don't know I'm so sorry

5 0
1 year ago
A ship, carrying freshwater to a desert island in the caribbean, has a horizontal cross-sectional area of 2800 m2 at the waterli
Alex17521 [72]
<span>Due that we already know the horizontal cross-sectional area of the ship, which is 2800 m2 and we are going to understand that value keeps constant for the whole 9.5 of height of the ship from the waterline till the new waterline after unloading, then we just need to calculate the volume as follows: V = A * H , where V is volume, A is area and H is height V= 2,800 * 9.5 = 26,600 m3 So this volum of 26,600 cubic meters is the volum of freshwater delivered in the island.</span>
3 0
3 years ago
True or false forces in a force pair never cancel each other out
pishuonlain [190]
The answer is false
3 0
3 years ago
Other questions:
  • The unit of length most suitable for measuring the thickness of a cell phone is a ( megameter, meter, millimeter, nanometer ) Th
    6·1 answer
  • During maneuvers preceding the Battle of Jutland, the British battle cruiser Lion moved as follows (in nautical miles): 1.2 mile
    6·1 answer
  • Part A Which of the following statements is/are true? Check all that apply.
    12·1 answer
  • Newtons first law of motion states that the velocity of an object doesn’t change if the forces acting on the object are
    5·1 answer
  • Which is a good example of a contact force?
    7·2 answers
  • What happens to an object when an unbalanced force acts on it?
    11·1 answer
  • If the total mechanical energy of the system is 100 J: Where does the pendulum have 100 J of kinetic energy? Where does the pend
    7·1 answer
  • 1.) What is the equation for Average Speed?
    10·2 answers
  • LPG is a better domestic fuel than wood?​
    13·1 answer
  • An fm radio station broadcasts at a frequency of 101. 3 mhz. What is the wavelength?.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!