Answer:
The answer is D. displacement
Explanation:
It will take you 0.23 seconds to hear your echo
<h3>
What is Echo ?</h3>
Echo can be simply defined as the reflection of sound wave.
Given that you are 38.6 m away from a rock wall, you yell. To know how much time in seconds it will take you to hear your echo to two significant digits, You must make sure to account for the travel from you to the wall and from the wall back to you.
- The speed of sound V = 340 m/s
- The distance D to and fro = 2 x 38.6 = 77.2 m
Speed V is the distance per time
V = D / T
Substitute all the parameters into the formula
340 = 77.2 / T
Make T the subject of formula
T = 77.2 / 340
T = 0.2270
T = 0.23 s to two significant digits
Therefore, it will take you 0.23 seconds to hear your echo.
Learn more about Echo here: brainly.com/question/14090821
#SPJ1
Answer:
Danny hits the water with kinetic energy of 5000 J.
Explanation:
Given that,
The Weight of Danny Diver,
F = 500 N
m*g= 500 N
He steps off a diving board 10 m above the water.
h=10 m
when Danny diver hits water he generates the kinetic energy.
We need to find the kinetic energy of the water.
Let kinetic energy is K.
K = m*g*h
Where g is acceleration due to gravity.
that g= 9.8 m/s^2
now substituting the values in above equation
K= (500) * 10
K= 5000 J
Hence,
he hits the water with kinetic energy of 5000 J.
Learn more about Kinetic energy here:
<u>brainly.com/question/15587458</u>
<u />
#SPJ4
White is a hotter color so it burns faster. :)
Answer:
<em>The magnetic field through the coil at first increases steadily up to its maximum value, and then decreases gradually to its minimum value.</em>
<em></em>
Explanation:
At first, the magnet fall towards the coils; inducing a gradually increasing magnetic field through the coil as it falls into the coil. At the instance when half the magnet coincides with the coil, the magnetic field magnitude on the coil is at its maximum value. When the magnet falls pass the coil towards the floor, the magnetic field then starts to decrease gradually from a strong magnitude to a weak magnitude.
This action creates a changing magnetic flux around the coil. The result is that an induced current is induced in the coil, and the induced current in the coil will flow in such a way as to oppose the action of the falling magnet. This is based on lenz law that states that the induced current acts in such a way as to oppose the motion or the action that produces it.