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Marina CMI [18]
3 years ago
8

A marble is thrown horizontally with a speed of 7 m/s. When the marble lands, it hastraveled a horizontal displacement of 30 m.

How much time was the marble in the air?
Physics
1 answer:
Alex Ar [27]3 years ago
6 0

Answer:

t = 4.28 s

Explanation:

The horizontal speed of a marble = 7 m/s

The horizontal displacement covered by the marble = 30 m

We need to find the time for which the marble is in air. Let the time is t. Using the formula for speed to find it as follows :

s=\dfrac{d}{t}\\\\t=\dfrac{d}{s}\\\\t=\dfrac{30\ m}{7\ m/s}\\\\=4.28\ s

So, it will in the air for 4.28 s.

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Explanation:

The measure expressing a "resistance to flow" is called viscosity. Viscosity relates to  internal friction forces in a fluid causing it to flow with more or less difficulty. Highly viscous stuff is perceived "thick" or "sticky."

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How does increasing the speed of a motorbike change the amount of energy in its kinetic energy store?
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A bird carrying a fish (5kg) drops it from 107 meters in the air how fast does the fish hit the ground
notka56 [123]

Answer:

The velocity of the fish hitting the ground is , v = 45.795 m/s        

Explanation:

Given data,

The mass of the fish, m = 5 kg

The height of the bird from the surface, h = 107 m

Using the III equation of motion,

                          v² = u² + 2gs

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Substituting the values,

                           v = √(0² + 2 x 9.8 x 107)  

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Hence, the velocity of the fish hitting the ground is, v = 45.795 m/s        

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Sound waves can be modeled by the equation of the form y=20sin(3t+theta). Determine what type of interference results when sound
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Explanation:

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3 years ago
Yashoda prepares some lime juice on a hot day. She adds 80 g of ice at a temperature of 0°C to 0.32 kg of lime juice. The temper
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Answer:

Explanation:

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c )

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d )

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