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Otrada [13]
3 years ago
13

Helppp plss

Physics
1 answer:
shutvik [7]3 years ago
3 0

Answer:

a) P = 149140[w]; b) 1491400[J]; c) v = 63.06[m/s]

Explanation:

As the solution to the problem indicates, we must convert the power unit from horsepower to kilowatts.

P = 200 [hp]

200[hp] * 745.7 [\frac{watt}{1 hp}]\\149140[watt]

Now the power definition is known as the amount of work done in a given time

P = w / t

where:

w = work [J]

t = time [s]

We have the time, and the power therefore we can calculate the work done.

w = P * t

w = 149140 * 10 = 1491400 [J]

And finally, we can calculate the velocity using, the expression for kinetic energy

E_{k}=w=0.5*m*v^{2}\\  where:\\v = velocity[m/s]\\m=mass=750[kg]\\w=work=1491400[J]\\

The key to solving this problem is to recognize that work equals kinetic energy

v=\sqrt{\frac{w}{0.5*m}}  \\v=\sqrt{\frac{1491400}{0.5*750}}  \\v=63.06[m/s]

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Three balls are kicked from the ground level at some angles above horizontal with different initial speeds. All three balls reac
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Time of flight  A is greatest

Explanation:

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So

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For maximum range we can write

D = u₁² sin2θ₁ /g

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2 D =u₃² sin2θ₃ / g

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u₂ sinθ₂ < u₁ sinθ₁

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Time of flight B < Time of flight  A

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8 0
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Describe an example where materials are prepared as fluids so that they can be moved easily
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A backyard swimming pool with a circular base of diameter 6.00m is filled to depth 1.50m. (b) Two persons with combined mass 150
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<h3>What is absolute pressure?</h3>

Absolute pressure is the force that exists in a space when there is no matter present, or when there is a perfect vacuum. This absolute zero serves as the baseline for measurements in absolute pressure. The measurement of barometric pressure is the greatest illustration of an absolute referenced pressure. In order to determine absolute pressure, a complete vacuum is used. In contrast, gauge pressure is the amount of pressure that is measured in relation to atmospheric pressure, also referred to as barometric pressure.

given,

diameter = 6 m

depth = h = 1.5 m

Atmospheric pressure = P₀ = 10⁵ Pa

a) absolute pressure

P = P₀ + ρ g h

P = 10⁵ + 1000 x 10 x 1.5

P = 1.15 x 10⁵ Pa

b) When two person enters into the pool,

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weight of water level displaced exists equal to the weight of person.

\rho \mathrm{Vg}=2 \mathrm{mg} \\

V=\frac{2 m}{\rho} \\

V=\frac{2 \times 150}{1000} \\

\mathrm{~V}=0.3 \mathrm{~m}^3

Area of pool $=\frac{\pi}{4} d^2$

&=\frac{\pi}{4} \times 6^2 \\

&=28.27 \mathrm{~m}^2

Height of the water rise

h &=\frac{V}{A} \\

h &=\frac{0.3}{28.27} \\

& \mathrm{~h}=0.0106 \mathrm{~m}

  • Pressure increased

P = ρ g h

P = 1000 x 10 x 0.0106

P = 106.103 Pa

To learn more about absolute pressure refer to:

brainly.com/question/17200230

#SPJ4

4 0
1 year ago
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