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An earthquake P wave traveling at 7.7km/s strikes a boundary within the Earth between two kinds of material.

If it approaches the boundary at an incident angle of 44? and the angle of refraction is 33?, what is the speed in the second medium?

Express your answer to two significant figures and include the appropriate units.

we have

sin i /sinr = v1/v2

v2 = v1 sin r/sini

v2 = 7.7 (sin33/sin44) km/s

v2 = 6.04km/s

The P-wave from an earthquake arrives at a seismic station at
10:20 am and the S-wave arrives at 10:25 am. Assuming the P-wave
velocity is 5 km s−1, and that Poisson’s ratio is 0.25, compute the
time at which the earthquake occurred and its epicentral distance
(in degrees) from the seismic station.

The intensity of an earthquake wave passing through the Earth is
measured to be 2.5×106 J/(m2⋅s) at a distance of 47 km
from the source.
What was its intensity when it passed a point only 1.0 kmkm from
the source?
Express your answer to two significant figures and include the
appropriate units.
At what rate did energy pass through an area of 4.0 m2m2 at 1.0
kmkm ?
Express your answer to two significant figures and include the
appropriate units.

The intensity of an earthquake wave passing through the Earth is measured to be 3.0 X 106 J/m2 s at a distance of 54 km from the source.
(a) What was its intensity when it passed a point only 1.0 km from the source?
(b) At what rate did energy pass through an area of 2.0m2 at 1.0 km?

The intensity of an earthquake wave passing through the Earth is measured to be 3.0 X 106 J/m2 s at a distance of 54 km from the source.
(a) What was its intensity when it passed a point only 1.0 km from the source?
(b) At what rate did energy pass through an area of 2.0m2 at 1.0 km?

An earthquake emits both S-waves and P-waves which travel at
different speeds through the Earth. A P=wave travels at 9000 m/s
and an S-wave travels at 5000 m/s. If the P-waves are received at a
seismic station 1 minute before an S-wave arrives, how far away is
the earthquake center?

A light ray strikes the perfectly smooth boundary between two
different materials. The index of refraction of the material before
the boundary is lower than that of the material after the boundary.
On the basis of this information, the light ray will be
a. partially transmitted in a direction deviating more from the
normal and partially reflected.
b. partially transmitted in a direction deviating less from the
normal and partially reflected.
c. partially transmitted exactly in the same direction and...

There are two types of seismic waves associated with every
earthquake, called P and S waves. They travel in every direction
away from the source of an Earthquake called the epicenter. Because
they each travel with different speeds, seismologists can determine
the distance from a seismic station to an epicenter. An earthquake
occurred in an area when a P wave travels at 5 km/s and the S wave
travels at 3 km/s. A seismic station measures an SP lag time...

Ball A with a mass of 2.0 kilograms is traveling at 8.0 m/s
strikes Ball B with a mass 5.0 kilograms which is at rest. After
the collision, Ball A moves away at an angle of 40.0 degrees above
the x-axis and Ball B moves away at an angle of -20.0 degrees below
the x-axis. What are the final velocities of each ball? Draw and
label a sketch of the problem.

The wave functions of two waves traveling in the same direction
are given below. The two waves have the same frequency, wavelength,
and amplitude, but they differ in their phase constant.
y1 (x,t) = 2 sin(2πx ‒ 20πt), and
y2 (x,t) = 2 sin(2πx ‒ 20πt + φ),
where, y is in centimetres, x is in meters, and t is in
seconds.
Assume that the two waves start to propagate at the same
instant, t_0,1 = t_0,2 = 0 sec,...

A 790-kg two-stage rocket is traveling at a speed of 6.60×103
m/s away from Earth when a predesigned explosion separates the
rocket into two sections of equal mass that then move with a speed
of 2.80×103 m/s relative to each other along the original line of
motion
What is the speed of each section (relative to Earth) after the
explosion?
Express your answers using three significant figures separated
by a comma.
V1,V2=
What are the direction of each section (relative...

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