Answer:5
Step-by-step explanation:
Add 6 and 4
2*10-3*5
Multiply 2 by 10
20-3*5
Multiply -3 by 5
20-15
Subtract 15 from 20
5
There needs to be 26. the 26th term will be 66
Answer:
The constriction is 13.94 m high from point A
Step-by-step explanation:
When we apply energy relation between point A and point B, we get:
Pb/ρg + Vb²/2g= Pa/ρg + Va²/2g - Head Loss - h
where,
Pb = Pressure at constriction (B) = 180.3 KPa = 180300 Pa
Vb = Velocity at constriction (B) = (0.3 m³/s)/π(0.15 m)² = 4.24 m/s
Pa = Pressure at (A) = 345 KPa = 345000 Pa
Va = Velocity at (A) = (0.3 m³/s)/π(0.3 m)² = 1.06 m/s
g = 9.8 m/s²
ρ = density of water = 1000 kg/m³
Head Loss = 2 m
h = Height of constriction = ?
Therefore:
h = (Pa- Pb)/ρg + (Va² - Vb²)/2g - Head Loss
h = (345000 Pa - 180300 Pa)/(1000 kg/m³)(9.8 m/s²) + [(1.06m/s)² - (4.24 m/s)²]/2(9.8 m/s²) - 2 m
h = 16.8 m - 0.86 m - 2 m
<u>h = 13.94 m</u>
Answer:
Step-by-step explanation:
Let the speed of Masha = s, speed of Dasha = d
- Distance = 20 km
- Time difference = 20 min = 1/3 hr
- Speed difference = 2 km/h
<u>As per above info we get following equations:</u>
- s = d + 2
- 20/s + 1/3 = 20/d
<u>Substitute s and solve for d:</u>
<u>Get rid of fraction by multiplying all terms by 3d(d + 2):</u>
- 60d + d(d + 2) = 60(d + 2)
- 60d + d² + 2d = 60d + 120
- d² + 2d = 120
- d² + 2d + 1 = 121
- (d + 1)² = 11²
- d + 1 = 11
- d = 10
<u>Find s:</u>
<u>The answer is</u>
- Masha's speed 12 km/h and Dasha's speed 10 km/h
Answer:
here is my solution for that problem. i hope it will work.