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Vesna [10]
3 years ago
15

A jet of water squirts out horizontally from a

Physics
1 answer:
Triss [41]3 years ago
6 0

Answer:

9.54 cm

Explanation:

The water is in free fall after it leaves the tank.  The time it takes to land is:

Δy = v₀ t + ½ at²

1.23 m = (0 m/s) t + ½ (9.8 m/s²) t²

t = 0.501 s

Therefore, the horizontal velocity is:

v = 0.685 m / 0.501 s

v = 1.37 m/s

Using Bernoulli equation, where point 1 is the surface of the water and point 2 is the exit of the tank:

P₁ + ½ ρ v₁² + ρgh₁ = P₂ + ½ ρ v₂² + ρgh₂

Since P₁ = P₂, and v₁ = 0:

ρgh₁ = ½ ρ v₂² + ρgh₂

gh₁ = ½ v₂² + gh₂

gh = ½ v₂²

h = v₂²/(2g)

Plugging in:

h = (1.37 m/s)² / (2 × 9.8 m/s²)

h = 0.0954 m

h = 9.54 cm

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4 0
3 years ago
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Describe how a planet, solar system, galaxy, and the universe are related in terms of size.
Alexus [3.1K]

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7 0
3 years ago
The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.320 with the floor. If
mart [117]

Answer:  29.50 m

Explanation: In order to calculate the higher accelation to stop a train  without moving the crates inside the wagon which is traveling at constat speed we have to use the second Newton law so that:

f=μ*N the friction force is equal to coefficient of static friction  multiply the normal force (m*g).

f=m.a=μ*N= m*a= μ*m*g= m*a

then

a=μ*g=0.32*9.8m/s^2= 3.14 m/s^2

With this value we can determine the short distance to stop the train

as follows:

x= vo*t- (a/2)* t^2

Vf=0= vo-a*t then t=vo/a

Finally; x=vo*vo/a-a/2*(vo/a)^2=vo^2/2a= (49*1000/3600)^2/(2*3.14)=29.50 m

5 0
3 years ago
A 1.2 kg hammer slams down on a nail at 5.0 m/s and bounces off at 1.0 m/s. If the impact lasts 1.0 ms, what average force is ex
Delvig [45]

Answer:

Explanation:

Impulse results in a change of momentum

FΔt = mΔV

F = mΔV/Δt

The impulse acting on the hammer will equal the impulse acting on the nail

If we assume upward is the positive direction

F = m(vf - vi)/t

F = 1.2(1.0 - (-1.5)) / 0.001

F = 3000 N

7 0
2 years ago
During an experiment, you take a measurement of 12.9 inches.
svlad2 [7]

Answer:

1 inch = 2.54 cm

12.9 inches= 12.9 x 2.54

= 32.766

= 32.8 cm (approximately)

Hope it helps...

7 0
3 years ago
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