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2 years ago

What is the wavelength of an earthquake wave if it has a speed of 7km/s and a frequency of 8hz

1 answer:

4 0

the wavelength formula is the frequency multiplication propagation velocity, do not forget to bring all the units into the international system

You might be interested in

A ball is thrown upward from ground level at a velocity of 55.5 m/s. What is the ball maximum height?

ollegr [7]

I believe the answer is 153.8 m.

5 0

2 years ago

Mt. Asama, Japan, is an active volcano. In 2009, an eruption threw solid volcanic rocks that landed 1 km horizontally from the c

Nata [24]

Answer:

a) 69.3 m/s

b) 18.84 s

Explanation:

Let the initial velocity = u

The vertical and horizontal components of the velocity is given by uᵧ and uₓ respectively

uᵧ = u sin 40° = 0.6428 u

uₓ = u cos 40° = 0.766 u

We're given that the horizontal distance travelled by the projectile rock (Range) = 1 km = 1000 m

The range of a projectile motion is given as

R = uₓt

where t = total time of flight

1000 = 0.766 ut

ut = 1305.5

The vertical distance travelled by the projectile rocks,

y = uᵧ t - (1/2)gt²

y = - 900 m (900 m below the crater's level)

-900 = 0.6428 ut - 4.9t²

Recall, ut = 1305.5

-900 = 0.6428(1305.5) - 4.9 t²

4.9t² = 839.1754 + 900

4.9t² = 1739.1754

t = 18.84 s

Recall again, ut = 1305.5

u = 1305.5/18.84 = 69.3 m/s

7 0

2 years ago

How did Koch choose candidates?

Salsk061 [2.6K]

They choose the ones who talk the most and could be seen as leaders

4 0

2 years ago

Your bedroom has a rectangular shape and you want to measure its size. You use a tape that is precise to 0.001 m and find that t

Alex73 [517]

Your bedroom has a rectangular shape, and you want to measure its area. You use a tape that is precise to 0.001 and find that the shortest wall in the room is 3.547 long. The tape, however, is too short to measure the length of the second wall, so you use a second tape, which is longer but only precise to 0.01 . You measure the second wall to be 4.79 long. Which of the following numbers is the most precise estimate that you can obtain from your measurements for the area of your bedroom?

b)If your bedroom has a circular shape, and its diameter measured 6.32 , which of the following numbers would be the most precise value for its area?

a)30 m^2

b) 31.4 m^2

c)31.37 m^2

d)31.371 m^2

Answer:

Part A

$A = 16.99 \ m^2$

Part B

$A_r =31.37 \ m^2$

Explanation:

From the question we are told that

The shortest wall is $x = 3.547 \ m$

The length of the second wall is $y = 4.79 \ m$

Generally the area is mathematically evaluated as

$A = x * y$

=> $A = 3.547 * 4.79$

=> $A = 16.99 \ m^2$

Given that the diameter is d = 6.32

Then the area is

$A_r = \pi \frac{d^2}{4}$

$A_r =3.142 * \frac{6.32^2}{4}$

$A_r =31.37 \ m^2$

3 0

2 years ago

What happens to the speed of an object when dropped at free fall

dedylja [7]

If it's not falling through air, water, smoke, or anything else,
and gravity is the only force on it, then its speed increases
at a constant rate ... 9.8 meters per second for every second
it falls. (That's the number on Earth. It's different in other places.)

3 0

3 years ago