Answer:
The time it takes the stone to reach the bottom of the cliff is approximately 4.293 s
Explanation:
The given parameters are;
The height of the cliff, h = 90.4 m
The direction in which the stone is thrown = Horizontally
The speed of the stone in the horizontal direction = 10 m/s
The time, t, it takes the stone to reach the bottom of the cliff is given by the equation for free fall as follows;
h = 1/2 × g × t²
Where;
g = The acceleration due to gravity = 9.81 m/s²
Substituting the values gives;
90.4 = 1/2 × 9.81 × t²
t² = 90.4/(1/2 × 9.81) ≈ 18.43 s²
t = √18.43 ≈ 4.293 s
The time it takes the stone to reach the bottom of the cliff is t ≈ 4.293 s.
Answer:
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Explanation:
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A) the universe is expanding
Every galaxy is moving away from each other - not just us. And the further they are away, the faster they are moving
Some physical properties of matter include viscosity (maple syrup is more viscous than oil), color (an apple can be red, while a watermelon is green), opacity (a computer screen is more opaque than a window), and freezing point (ice with salt has a lower freezing point than plain ice).
Some chemical properties include pH (milk of magnesia v. wine), and heat of combustion.
Hope that helped you!