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
Harman [31]
2 years ago
9

A hiker shouts toward a vertical cliff 685 m away. The echo is

Physics
1 answer:
miv72 [106K]2 years ago
7 0
To find the speed of sound you take the distance and divide it by the time so 685/4 which equals 171.25 m/s
You might be interested in
okay i was trying to see if yall know this okay a wave is a repeating disturbance of movement that transfers .........blank
Lemur [1.5K]
Energy through space or matter.
8 0
3 years ago
The image below shows four points on the orbit of a comet around the Sun.
Firlakuza [10]

Answer:

<u>Point </u><u>A</u>

Explanation:

And the strongest force of gravity is point C

3 0
3 years ago
A circular parallel plate capacitor is constructed with a radius of 0.52 mm, a plate separation of 0.013 mm, and filled with an
olya-2409 [2.1K]

Answer:

289282

Explanation:

r = Radius of plate = 0.52 mm

d = Plate separation = 0.013 mm

A = Area = \pi r^2

V = Potential applied = 2 mV

k = Dielectric constant = 40

\epsilon_0 = Electric constant = 8.854\times 10^{-12}\ \text{F/m}

Capacitance is given by

C=\dfrac{k\epsilon_0A}{d}

Charge is given by

Q=CV\\\Rightarrow Q=\dfrac{k\epsilon_0AV}{d}\\\Rightarrow Q=\dfrac{40\times 8.854\times 10^{-12}\times\pi \times (0.52\times 10^{-3})^2\times 2\times 10^{-3}}{0.013\times 10^{-3}}\\\Rightarrow Q=4.6285\times 10^{-14}\ \text{C}

Number of electron is given by

n=\dfrac{Q}{e}\\\Rightarrow n=\dfrac{4.6285\times 10^{-14}}{1.6\times10^{-19}}\\\Rightarrow n=289281.25\ \text{electrons}

The number of charge carriers that will accumulate on this capacitor is approximately 289282.

6 0
3 years ago
Define the fundamental difference between kinematics and dynamics. .
Tcecarenko [31]

In kynematics you describe the motion of particles using vectors and their change in time. You define a position vector r for a particle, and then define velocity v and acceleration a as

v=\frac{dr}{dt} \\

a=\frac{dv}{dt}

In dynamics Newton's laws predict the acceleration for a given force. Knowing the acceleration, and the kynematical relations defines above, you can solve for the position as a function of time: r(t)

5 0
3 years ago
What do you know about nuclear energy?​
aev [14]

Answer:

Nuclear energy comes from splitting atoms in a reactor to heat water into steam, turn a turbine and generate electricity. Ninety-three nuclear reactors in 28 states generate nearly 20 percent of the nation's electricity, all without carbon emissions because reactors use uranium, not fossil fuels.

<h2>please follow me</h2>
6 0
2 years ago
Other questions:
  • A 12-inch object is placed 30 inches in front of a plane mirror. A ray of light from the object strikes the mirror at a 45-degre
    5·2 answers
  • ______ consist of one large main root with smaller roots branching off, while _____ consist of several main roots that branch of
    9·1 answer
  • What best describes the angle between a changing electric field and the electromagnetic wave produced by it?
    12·1 answer
  • What is the displacement of a student who walks 12 m North, 5 m West, 3 m South,
    10·1 answer
  • A device is turned on and 3.20 A flows through it 0.130 ms later. What is the self-inductance of the device (in mH) if an induce
    15·1 answer
  • A student carries a backpack for one mile. Another student carries the same backpack for two miles
    12·1 answer
  • Ytuugtfghrddfghjiuyhhffdfvhj
    10·2 answers
  • A student drops a ball from a slope. He notices the ball rolling down as shown in the image.
    14·1 answer
  • How do you find distance from average velocity and time
    7·1 answer
  • what is our best hypothesis for why all the planets in our solar system orbit in the same direction as the sun rotates?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!