Magma can be classified in two ways. when it is inside the volcano it is called magma, but when it is out of the volcano it is called lava or such as :
basalt, ashes, obsidian. magma is also called the names that have been listed because magma and lava are pretty much the same thing just magma is inside the volcano and lava is outside... hope this help you
The answer is true I did that test befor
Answer:
Explanation:
a )
59° south of west means (180 + 59 )° counterclockwise from the +x-axis.
so angle θ = 239 ° .
r = 3.5 miles .
polar coordinates ( r , θ )
= ( 3.50 , 239° )
As the smallest positive angle in degree is 26 then 26 x 9 = 234
so rounding off 239 to 234 , the angle will be 234
polar coordinates ( 3.50 , 234 )
b )
Cartesian coordinates (in miles) for the same point
x coordinate = r cosθ = 3.5 cos 234 = - 2.06 mi
y coordinate = r sinθ = 3.5 sin 234 = - 2.83 mi
Answer:
the intensity of the sound waves produced by one 60-w speaker at a distance of 1.0 m is 60 w/m²
Explanation:
Intensity of sound , I, is given as;
I = P/A
Where;
P is the power through an area = 60-w
A is the area = ?
A = 1.0m × 1.0m = 1.0 m²
I = 60-w / 1.0 m²
I = 60 w/m²
Therefore, the intensity of the sound waves produced by one 60-w speaker at a distance of 1.0 m is 60 w/m²