How volcanoes are made summary

Physics

1 answer:

Alex777 [14]3 years ago

3 0

Volcanoes<span> are formed when magma from within the Earth's upper mantle works its way to the surface.</span>

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Find initial velocity and time in air

kkurt [141]

Answer:

The answer to your question is: v = 121.46 m/s

Explanation:

Data

h = 30 m

vo = ?

dx = 300 m

Formula

t = $\sqrt{\frac{2h}{g}}$

speed = distance / time

Process

$t = \sqrt{\frac{2(30)}{9.81}} \\$

t= 2.47 s

speed = 300 / 2.47

speed = v = 121.46 m/s

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3 years ago

What is the intensity of a sound with a measured intensity level of 84 db? (i0 = 10-12 w/m2)?

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The unit measurement for sound can be expressed in terms of intensity and in decibels. The intensity of sound is the measure of its power over unit area. The common unit of measurement is in decibels. This is commonly used in measuring the extent of noise. The conversion from intensity to the decibel unit is through logarithmic function. The formula is:

dB = 10 log(I/I0), where I0 is 10^-12 Watts per square meter

Substituting the values to the equation,

84 = 10log(I/10^-12)
I = 0.0002512 W/m2

In scientific notation the intensity is 2.512 x 10^-4 W/m^2.

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4 years ago

A 1,250 kg car is moving due to 6,500 N engine force. If the kinetic friction coefficient between the car and the road is 0.32,

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3 years ago

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it tak

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Answer:

754.8 m