Answer:
a)188.65m
b)154.35m
c)243.7m
Explanation:
Given data:
![t_A=0.55s](https://tex.z-dn.net/?f=t_A%3D0.55s)
![t_B=0.45s](https://tex.z-dn.net/?f=t_B%3D0.45s)
(a) The distance from the kicker to each of the 2 spectators is given by:
![d_A=v \times t_A](https://tex.z-dn.net/?f=d_A%3Dv%20%5Ctimes%20t_A)
where,
v= speed of sound
=time taken for the sound waves to reach the ears
m
(b)![d_B=v \times t_B](https://tex.z-dn.net/?f=d_B%3Dv%20%5Ctimes%20t_B)
where,
v= speed of sound
=time taken for the sound waves to reach the ears
![d_B=343\times 0.45=154.35m](https://tex.z-dn.net/?f=d_B%3D343%5Ctimes%200.45%3D154.35m)
(c)As the angle b/w slight lines from the two spectators to the player is right angle,
hypotenuse=the distance b/w 2 spectators
and, the slight lines are the other 2 lines
![D^2=d_A^2+d_B^2\\D=\sqrt{188.65^2+154.35^2} \\D= 243.7m](https://tex.z-dn.net/?f=D%5E2%3Dd_A%5E2%2Bd_B%5E2%5C%5CD%3D%5Csqrt%7B188.65%5E2%2B154.35%5E2%7D%20%5C%5CD%3D%20243.7m)
Answer:
13.875 T
Explanation:
Parameters given:
Length of solenoid, L = 2.5 cm = 0.025 m
Radius of solenoid, r = 0.75 cm = 0.0075 m
Number of turns, N = 25 turns
Current, I = 1.85 A
Magnetic field, B, is given as:
B = (N*r*I) /L
B = (25 * 0.0075 * 1.85)/0.025
B = 13.875 T
Answer:
the correct answer is C, E’= 4E
Explanation:
In this exercise you are asked to calculate the electric field at a given point
E = ![k \frac{q}{r^2}](https://tex.z-dn.net/?f=k%20%5Cfrac%7Bq%7D%7Br%5E2%7D)
indicates that the field is E for r = 2m
E =
(1)
the field is requested for a distance r = 1 m
E ’= k \frac{q}{r'^2}
E ’= k q / 1
from equation 1
4E = k q
we substitute
E’= 4E
so the correct answer is C
Answer:
B and C
Explanation:
I got it right on my a pex test
Answer:
I can only define a few of them, hope you don't mind.
Seismic- It means connected with or caused by earthquakes
Epicenter- It means the point on the earth's surface where the effects of an earthquake are most felt strongly.
Fault- A place where there is a break that is longer than usual in the layers of rock in the earth's crust.
Tectonic waves- Waves connected with the structure of the earth's surface.
Plate boundaries- The boundaries that differentiates the large sheets of rock (called PLATES) that form the earth's surface. Plate tectonics is the movement of the large sheets of rocks that form the earth's surface