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
sergij07 [2.7K]
3 years ago
8

At a construction site, the site manager notices that a crane takes 20 seconds to lift a 500kg steel beam up to a height of 15 m

eters. From this information, he calculates the power output of the crane to be what value?
Physics
1 answer:
posledela3 years ago
5 0
The work done is equal to the change in potential energy which is:
P.E = mgh
P.E = 500 x 9.81 x 15
P.E = 73,575 J

Power = work / time
Power = 73,575 / 20
Power = 3,700 Watts
You might be interested in
A series RCL circuit consists of a 50 Ω resistor, 500 Ω capacitor, and a 500 Ω inductor. What is the angle of impedance?
lbvjy [14]

Answer:

Zero

Explanation:

here, the inductive reactance and the capacitive reactance is same, so this is the condition for resonance.

In the condition for resonance,

the circuit and the voltage in the circuit is in the same phase and the impedance of the circuit is minimum which is equal to the resistance of the circuit.

The phase angle is given by

tan\phi =\frac{X_{L}-X_{C}}{R}

Ф = 0

5 0
3 years ago
Which of the following is not a type of system?
Brums [2.3K]
<span>Social 
i think so ,but  i am not sure</span>
5 0
3 years ago
Define what is meant by restrictive interventions
zzz [600]
Medical movement for disabilities people
5 0
3 years ago
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor di
Marrrta [24]

Answer:

2625 m deep

Explanation:

Let the sound speed in sea water be 1500 m/s. If he hears the echo 3.5s after the strike, then the sound would have traveled a distance of 1500 * 3.5 = 5250 m to the bottom and back. This would mean the ocean is 5250 / 2 = 2625 m deep.

5 0
3 years ago
The sound wave produced from playing the A key one octave above the "Middle C" on the plano produces a sound wave with a frequen
natita [175]

Answer:

<u>Frequency</u>- number of wave cycles that occur in a given amount of time.

<u>Pitch</u>- number of wavelengths in a given amount of time.

<u>Amplitude</u>- fluctuation or displacement of a wave from its mean value. That means how high or low they are away from the center line.

<u>Volume</u>- The perception of loudness from the intensity of a sound wave. The higher the intensity of a sound, the louder it is perceived in our ears, and the higher volume it has.

<u>Wavelength</u>- the distance between the tops of the "waves".

3 0
3 years ago
Read 2 more answers
Other questions:
  • A skier moving at 4.75 m/s encounters a long, rough, horizontal patch of snow having a coefficient of kinetic friction of 0.220
    14·1 answer
  • Two identical freight cars roll without friction (one at 1 m/s, the other at 2 m/s) toward each other on a level track. They col
    14·1 answer
  • How is thermal energy transferred?
    13·2 answers
  • Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase you
    6·2 answers
  • Use the information from the article to answer the question.
    9·2 answers
  • Help help help please , i will give brainliest
    5·2 answers
  • The simplest form of a substance
    11·1 answer
  • What happens to an egg when you leave it in vinager?
    11·1 answer
  • g f, as a pioneer, you wished to warm your room by taking an object heated on top of a stove into it, which of the following 15
    13·1 answer
  • A raft has a mass of 152 kg. When a
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!