A volcano erupts and launches a chunk of hot magma horizontally with a speed of 252 m/s. The magma travels a horizontal distance of 1250 m before it hits the ground. We can ignore air resistance. What is the vertical velocity of the magma when it hits the ground?

The value is

Explanation:

From the question we are told that

   The horizontal speed is  

    The horizontal distance is  

Generally the time taken by the hot magma in air before landing is mathematically represented as

=>    

=>    

Generally the initial vertical velocity of the magma when it was lunched is  

Then the final velocity of the magma when it hits the ground is mathematically represented s

Here the negative sign mean that the direction of the velocity is towards the negative y -axis

So  

=>    

b.a device that inputs heat into a cool object

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.