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
leva [86]
1 year ago
13

I started to solve this problem but I’m not sure on what to do next.

Physics
1 answer:
snow_tiger [21]1 year ago
7 0

ANSWER:

3408.81 kg

STEP-BY-STEP EXPLANATION:

Given:

v = 111 m/s

Ek = 21000000 J

We have that the formula for kinetic energy is as follows:

E_k=\frac{1}{2}\cdot m\cdot v^2

We substitute the values given in the exercise and solve for m (mass)

\begin{gathered} 21000000=\frac{1}{2}\cdot m\cdot111^2 \\ m=\frac{21000000\cdot2}{111^2} \\ m=3408.81\text{ kg} \end{gathered}

The mass of the helicopter is 3408.81 kilograms.

You might be interested in
A merry-go-round at a playground is a circular platform that is mounted parallel to the ground and can rotate about an axis that
hram777 [196]

Answer:

V_2=3.3m/s

Explanation:

From the question we are told that:

Distance d_1=1.4m

Tangential speed V=2.2m/s

Distance 2 d_2=2.1m

Generally the equation for Angular velocity is mathematically given by

 w=\frac{v}{r}

Therefore

 \frac{v_1}{r_1}=\frac{v_2}{r_2}

 V_2=\frac{2.2*2.1}{1.4}

 V_2=3.3m/s

8 0
3 years ago
The noise from a power mower was measured at 104 dB. The noise level at a rock concert was measured at 121 dB. Find the ratio of
UkoKoshka [18]

Based on the calculations, the ratio of the intensity of Ir to Ip is equal to 50.12.

<h3>How to find the ratio of the intensity?</h3>
  • Let the intensity of the power mower be Ip.
  • Let the intensity of the rock music be Ir.

Mathematically, sound intensity level can be calculated by using this formula:

\beta = 10 log(\frac{I}{I_{ref}} )

<u>Where:</u>

I is the intensity of the sound.

Making I the subject of formula, we have:

I = Io × 10^{\frac{\beta }{10} }

For Ip, we have:

Ip = Io × 10^{\frac{104 }{10} }

Ip = Io × 10^{10.4}

For Ir, we have:

Ir = Io × 10^{\frac{121 }{10} }

Ir = Io × 10^{12.1}

Now, we can find the ratio of the intensity:

Ir/Ip = Io × 10^{12.1}/Io × 10^{10.4}

Ir/Ip = 10^{12.1}/10^{10.4}

Ir/Ip = 10^{12.1 -10.4}

Ir/Ip = 10^{1.7}

Ir/Ip = 50.12.

Read more on sound intensity here: brainly.com/question/17062836

#SPJ1

8 0
2 years ago
How would you describe your appetite over the past couple of weeks? Have your eating habits altered in any way?
wolverine [178]

Answer:

no im in a rehab program so we eat the sam shi every day

Explanation:

brainlest?

5 0
3 years ago
Read 2 more answers
A block of mass m=3.0 kg is pushed down a 50° incline surface with a force of magnitude F=40 N.
Sauron [17]

Answer:

I really don't know but please if you find the correct answer tell me because I'm eager to know

7 0
3 years ago
4. What is avarage velocity? (AS)<br>​
sasho [114]

Answer:

average velocity = displacement/time

5 0
4 years ago
Read 2 more answers
Other questions:
  • An electric heater is operated by applying a potential difference of 78.0 V across a nichrome wire of total resistance 7.00 Ω. a
    6·1 answer
  • 1pt Which is an observation? O A. A person hears the song of a bird. OB. A person suggests that bird calls are a means of commun
    10·1 answer
  • A 1200-kg ore cart is rolling at 10.8 m/s across a flat friction-free surface. a crane suddenly drops of ore vertically into the
    11·1 answer
  • During an ice hockey game, George had two shots on goal: one shot from 5m away at 10m/s and one shot from 10m away at 40m/s. Whi
    7·1 answer
  • A 0.2kg mass attached to the end of a spring is whirled in a vertical circle by a student. At some position, the mass experience
    12·1 answer
  • Answer pls…………………………
    13·1 answer
  • What is the magnitude of the moon's acceleration due to the gravitational force of the earth?
    12·1 answer
  • Which equation will tell you the acceleration of the object?
    10·1 answer
  • Help please!! Physics grade 8​
    13·1 answer
  • Name your favorite color.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!