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Sauron [17]
3 years ago
11

Larry drops a 5kg ball off of a building. The ball hits the ground 4.7s later. How tall is the building?

Physics
1 answer:
musickatia [10]3 years ago
8 0

Explanation:

Given:

v₀ = 0 m/s

a = 9.8 m/s²

t = 4.7 s

Find: Δy

Δy = v₀ t + ½ at²

Δy = (0 m/s) (4.7 s) + ½ (9.8 m/s²) (4.7 s)²

Δy ≈ 110 m

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Energy is released in the reaction

Explanation:

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This indicates that the reaction is an exothermic or exergonic reaction.

These reaction types are accompanied by release of energy.

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Read 2 more answers
A 7.5-cmcm-diameter horizontal pipe gradually narrows to 4.5 cmcm . When water flows through this pipe at a certain rate, the ga
tino4ka555 [31]

Answer

given,

diameter,d₁ = 7.5 cm

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P₂ = 25 kPa

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 π r₁² v₁ = π r₂² v₂

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 P_1-P_2 = \dfrac{1}{2}\rho (v_2^2-(0.36 v_2)^2)

 32-25 = \dfrac{1}{2}1000\times v_2^2 (1 - 0.1269)

 v_2=\sqrt{\dfrac{2\times 7\times 10^3}{1000\times (0.8704)}}

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Q = A₂ V₂

Q = π (0.0225)²  x 4.01

Q = 6.38 x 10⁻³ m³/s

flow in the pipe is equal to 6.38 x 10⁻³ m³/s

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Describe the process you used to build a model
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What level of intensity is bicycling 5-9 mph on level terrain?
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