In 1 hour, the hour hand sweeps across 1/12 of the clock's face. In 40 min, the hour hand travels (40 min)/(60 min) = 2/3 of the path it covers in an hour, so a total of 1/12 × 2/3 = 1/18 of the clock's face. This hand traces out a circle with radius 0.25 m, so in 40 min its tip traces out 1/18 of this circle's radius, or
1/18 × 2<em>π</em> (0.25 m) ≈ 0.087 m
The minute hand traverses (40 min)/(60 min) = 2/3 of the clock's face, so it traces out 2/3 of the circumference of a circle with radius 0.31 m:
2/3 × 2<em>π</em> (0.31 m) ≈ 1.3 m
The second hand completes 1 revolution each minute, so in 40 min it would fully trace the circumference of a circle with radius 0.34 m a total of 40 times, so it covers a distance of
40 × 2<em>π</em> (0.34 m) ≈ 85 m
The exact distance from the seismic station to the epicenter is 6000 km.
<h3>
Epicenter of earthquake</h3>
The earthquake's epicenter is the point above the fault location on the earth's surface.
Given that:
A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20.
Difference in arrival time = 3:07:20 - 3:00:00 = 7 minutes 20 seconds
From the earthquake time travel graph, a time difference of 7 min 20 sec is at x = 6
The exact distance from the seismic station to the epicenter is 6000 km.
Find out more on Epicenter of earthquake at: brainly.com/question/1969968
Answer:
0.99m
Explanation:
Firs you calculate the relative velocity between the boat and the wave. The velocity of the boat is 5m/s and the velocity of the wave is given by:

the relative velocity is:

This velocity is used to know which is the distance traveled by the boat after 20 seconds:

Next, you use the general for of a wave:

you take the amplitude as 2.0/2 = 1.0m.

by replacing the values of the parameters in f(x,t) you obtain the vertical displacement of the boat:

<span>The correct answer to
the question that is stated above is obviously letter b, false.
</span>Seismic waves travel along the Earth’s surface.They are <span>waves of </span>energy<span> that travel through the </span>Earth<span>'s layers. These waves are a result of an </span>earthquake <span>, </span>volcanic<span> eruptions, magma movement and large </span>landslides.
Answer:
0.857 cm
Explanation:
We are given that:
The focal length for a convex lens to be (f) = 1.5cm
The object distance (u) = - 2.0 cm
We are to determine the image distance (v) = ??? cm
By applying the lens formula:

By rearrangement and making (v) the subject of the above formula:

replacing the given values:


v = 0.857 cm