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
Ilya [14]
3 years ago
12

a fire woman dropped a person onto the safety net. right before the person hit the net he had a velocity of 11.2m/s and 1800j of

kinetic energy
Physics
2 answers:
Kipish [7]3 years ago
8 0

Answer:

28.699

Explanation:

Ludmilka [50]3 years ago
5 0

Answer: 28.699

Explanation:

KE=1/2(mv²)

1800=1/2m (125.44)

14.349=2m

m=28.699

You might be interested in
Imagine that you are approaching a black hole in a spacecraft. what would you see? what would happen to you?
Vladimir79 [104]
You will see some thing pitch black pulling you. you will feel an immense pull or attraction while going rapidly inside the black hole. 
3 0
3 years ago
What are atoms of the same element with different numbers of neutrons called?
Andrei [34K]

Answer:

These are called isotopes.

Explanation:

Please mark brainliest and have a great day!

6 0
3 years ago
An object has an initial velocity v and uniform acceleration a. If it covers a distance d, then its final velocity, v, is given
viktelen [127]

Answer:

.

Explanation:

5 0
3 years ago
By what factor is the intensity of sound at a rock concert louder than that of a whisper when the two intensity levels are 120 d
77julia77 [94]

Answer:

The intensity of sound at rock concert is  10¹⁰ greater than that of a whisper.

Explanation:

The intensity of sound is given by;

I(dB) = 10Log(\frac{I}{I_o} )

where;

I is the intensity of the sound

I₀ is the threshold of sound intensity = 1 x 10⁻¹² W/m²

The intensity of sound at a rock concert

120 = 10Log(\frac{I}{1*10^{-12}} )\\\\12 = Log(\frac{I}{1*10^{-12}} )\\\\\frac{I}{1*10^{-12}} = 10^{12}\\\\I = 1*10^{-12} *10^{12}\\\\I = 1*10^0\\\\I =1 \ W/m^2

The intensity of sound of a whisper

20 = 10Log(\frac{I}{1*10^{-12}} )\\\\2 = Log(\frac{I}{1*10^{-12}} )\\\\\frac{I}{1*10^{-12}} = 10^{2}\\\\I = 1*10^{-12} *10^{2}\\\\I = 1*10^{-10}\\\\I =10^{-10} \ W/m^2

Thus, the intensity of sound at rock concert is  10¹⁰ greater than that of a whisper.

4 0
3 years ago
True or False. The wavelength (of a sinusoidal wave) is the distance from one crest to the next crest.​
Irina-Kira [14]

Answer:

true

Explanation:

3 0
3 years ago
Other questions:
  • Both acids and bases produce ions when dissolved in water. Propose a way to describe what
    8·2 answers
  • What particle moves around the nucleus and has a negative charge??
    8·1 answer
  • Ryan is experimenting with core materials for an electromagnet. He slides different core materials through a coil of current-car
    13·2 answers
  • What is the definition of psychology
    13·2 answers
  • What is electrical power in terms of current and potential difference? Explain.
    9·1 answer
  • A steel wire of length 31.0 m and a copper wire of length 16.0 m, both with 1.00-mm diameters, are connected end to end and stre
    10·1 answer
  • Why are we integrating the differential x-component of the e field of this charged ring?
    6·1 answer
  • A single force acts on a 2.0 kg particle-like object in such a way that the position of the object as a function of time is give
    9·1 answer
  • A lion with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. The distance between the lion and the gazelle is 2 meter
    6·1 answer
  • Calculate the work done when lifting a sack of potatoes with a force of 100N vertically<br> 6m.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!