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
worty [1.4K]
2 years ago
8

Isabela creates a demonstration showing a sound echo. How could she demonstrate this?

Physics
1 answer:
jeka942 years ago
6 0

Answer:

A

Explanation:

took it in test prep

You might be interested in
Which of the following describes what all electromagnetic waves have in common?
Solnce55 [7]
They all move through empty space at the speed of light
3 0
2 years ago
Consider f(x) = -4x2 + 24x + 3. Determine whether the function has a maximum or minimum value. Then find the
murzikaleks [220]

Answer:

The function has a maximum in x=3

The maximum is:

f(3) = 39

Explanation:

Find the first derivative of the function for the inflection point, then equal to zero and solve for x

f(x)' = -4*2x + 24=0

-4*2x + 24=0

8x=24

x=3

Now find the second derivative of the function and evaluate at x = 3.

If f (3) ''< 0 the function has a maximum

If f (3) '' >0 the function has a minimum

f(x)''= 8

Note that:

f(3)''= -8

the function has a maximum in x=3

The maximum is:

f(3)=-4(3)^2+24(3) + 3\\\\f(3) = 39

4 0
3 years ago
What is the weight of a dust particle
Alexandra [31]

Answer:

The mass of a dust particle is 7.53 x 10^-10 kg. (Hope it helped.)

Explanation:

3 0
3 years ago
Solve for work when
BlackZzzverrR [31]

So, <u>the value of the work is approximately 84.65 J</u>.

<h2>Introduction</h2>

Hi ! Here I will help you to discuss the subject about work that caused by force in amount value of angle. Work is affected by the force and displacement.

  • If related to the magnitude of the force, the amount of work will be proportional to the magnitude of the applied force. Thats mean, if the value of the force that applied on it is greater, then the value of the work will be greater.
  • If related to the magnitude of shift, the amount of work will be proportional to the magnitude of shift of object. Thats mean, if the value of the shift on it is greater, then the value of the work will be greater.
<h3>Formula Used</h3>

The work done by a moving object can be expressed in the equation:

If the Angle Is Ignored

\boxed{\sf{\bold{W = F \times s}}}

If the Angle Effect on Work

\boxed{\sf{\bold{W = F \times s \times \cos(\theta)}}}

With the following condition:

  • W = work that done by object (J)
  • F = force that applied (N)
  • s = shift or distance (m)
  • \sf{\theta} = angle of elevation (°)

<h3>Solution</h3>

We know that :

  • F = force that applied = \sf{1.41 \times 10^4} N
  • s = shift or distance = 84.9 m
  • \sf{\theta} = angle of elevation = 45°

What was asked ?

  • W = work that done by object = ... J

Step by step :

\sf{W = F \times s \times \cos(\theta)}

\sf{W = (1.41 \cdot 10^4) \times 84.9 \times \cos(45^o)}

\sf{W = (1.41 \cdot 10^4) \times 84.9 \times \frac{\sqrt{2}}{2}}

\sf{W = 119.709 \times \frac{\sqrt{2}}{2}}

\sf{W = 59.8545 \sqrt{2}}

\boxed{\sf{W \approx 84.65 \: J}}

<h3>Conclusion</h3>

So, the value of the work is approximately 84.65 J.

3 0
1 year ago
Which phase of cell division is shown?
dalvyx [7]

Answer:

what was the answer

Explanation:

im taking the quiz and could use some help

6 0
3 years ago
Other questions:
  • Describe what it means to view something from a frame of reference. Give an example to illustrate your explanation.
    10·1 answer
  • i will give brainliest Which of the following structures are present in plant cells but absent in animal cells? Choose 1 answer:
    11·1 answer
  • Which describes how a turbine works to produce energy for electricity? A. Energy from various energy sources, such as wind or fr
    12·1 answer
  • What is the wavelength (in air) of a 13.0 khz vlf radio wave?
    8·1 answer
  • Two lightbulbs are wired in series and connected to a 12-volt battery. what happens to the current through the battery if a thir
    11·2 answers
  • The topsoil layer has the greatest concentration of organic matter. The subsoil generally lacks organic matter, but it does rece
    6·1 answer
  • An object is moving in a straight line at constant speed. A resultant torce begins to act upon
    6·1 answer
  • What do fast-twitch and slow-twitch muscle fibers share in common
    10·1 answer
  • Silicon (chemical symbol Si) is located in Group 14, Period 3. Which is silicon
    14·1 answer
  • A scientist adds different amounts of salt to 5 bottles of water. She then measures how long it takes for the water to boil. Wha
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!