Physics, 06.10.2019 19:30 davelopez979

Where is the most of the liquid freshwater on earth located?

a. lakes

b. rivers

c. oceans

d. wetlands

Answers: 2

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This is what a calorimeter is used for simpler ex, to measure calories in food.

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explanation:

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Idk206+25895985898+9which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? which statement is the best description of a value proposition? +

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Part a: using momentum conservation we have: direction x: (15) (7.0) + 0 = (15) (4.2) cos (-20 °) + (10) v₂ (f) cosθ (10) v₂ (f) cosθ = (15) (7.0) - (15) (4.2) cos (-20 °) (eq 1) direction y: 0 + 0 = (15) (4.2) sin (-20 °) + (10) v₂ (f) sinθ (10) v₂ (f) sinθ = - (15) (4.2) sin (-20 °) (eq 2) we divide both equations (1) and (2): left side: (10) v₂ (f) sinθ / (10) v₂ (f) cosθ = tanθ right side: - (15) (4.2) sin (-20 °) / (15) (7.0) - (15) (4.2) cos (-20 °) clearing the angle we have: θ = tan⁻¹ [- (15) (4.2) sin (-20 °) / (15) (7.0) - (15) (4.2) cos (-20 °)] θ = 25 ° we use any of the equations to find the speed. from (2) we have: (10) v₂ (f) sinθ = - (15) (4.2) sin (-20 °) v₂ = - (15) (4.2) sin (-20 °) / (10) sin25 ° answer: v₂ = 5.1m / s note: θ = 25 ° (direction is in the first quadrant, north of east) part b: initial kinetic energy: k (i) = 0.5 (15) (7.0) ² = 370j (rounded) final kinetic energy: ke (f) = 0.5 (15kg) (4.2m / s) ² + 0.5 (10kg) (5.1m / s) ² = 260j (rounded) answer: a difference of 110j, so it was an inelastic collision.

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Where is the most of the liquid freshwater on earth located?

a. lakes

b....

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