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Anvisha [2.4K]
3 years ago
7

Velocityis a vector quantity which has both magnitude and direction. Using complete sentences, describethe object's velocity. Co

mment on both the magnitude and the directio
Physics
1 answer:
mr_godi [17]3 years ago
8 0

Answer:

Explanation:

A physical quantity which can be completely described by the magnitude and direction both are called vector quantities. For example, displacement, velocity, etc.

A physical quantity which can be completely explained by the magnitude only is called scalar quantity. For example, mass, time, etc.

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A 1.78-m3 rigid tank contains steam at 220°C. One-third of the volume is in the liquid phase and the rest is in the vapor form.
mafiozo [28]

Answer:

a) P = 2319.6[kPa]; b) 2.6%

Explanation:

Since the problem data is not complete, the following information is entered:

A 1.78-m3 rigid tank contains steam at 220°C. One-third of the volume is in the liquid phase and the  rest is in the vapor form. Determine (a) the pressure of the steam, and (b) the quality of the saturated  mixture.

From the information provided in the problem we can say that you have a mixture of liquid and steam.

a) Using the steam tables we can see (attached image) that the saturation pressure at 220 °C is equal to:

P_{sat} =2319.6[kPa]

v_{f}=0.001190[m^{3}/hr]\\v_{g}=0.08609[m^{3}/hr]\\

b) Since the specific volume of the gas and liquid is known, we can find the mass of each phase using the following equation:

m_{f}=\frac{V_{f} }{v_{f} }  \\m_{g}=\frac{V_{g} }{v_{g} }  \\where:\\V_{f}=volume of the fluid[m^3]\\v_{f}=specific volume of the fluid [m^3/kg]\\

We know that the volume of the fluid is equal to:

V_{f}=1/3*V_{total}  \\V_{total}=1.78[m^3]\\

Now we can find the mass of the gas and the liquid.

m_{f}=\frac{1/3*1.78}{0.001190}  \\m_{f}=498.6[kg]\\m_{g}=\frac{2/3*1.78}{0.08609}\\m_{g}=\ 13.78[kg]

The total mass is the sum of both

m_{total} =m_{g} + m_{fluid} \\m_{total} = 498.6 + 13.78\\m_{total} = 512.38[kg]

The quality will be equal to:

x = \frac{m_{g} }{m_{T} }\\ x= \frac{13.78}{512.38} \\x = 0.026 = 2.6%

5 0
3 years ago
Which of the following water waves has more energy?
wolverine [178]

Tsunami Waves or option B would be your answer.

7 0
3 years ago
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Which statement is true? *
never [62]

The last paragraph is the correct statement.  Please don't make me type it all out.

6 0
3 years ago
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An unwary football player collides with a padded goalpost while running at a velocity of 9.50 m/s and comes to a full stop after
Amanda [17]

Answer:

(a) The collision lasts for 0.053 s.

(b) The deceleration is 180.5 m/s².

Explanation:

Given:

Initial velocity of the player (u) = 9.50 m/s

Final velocity of the player (v) = 0 m/s (Comes to a stop)

Displacement of the player (S) = 0.250 m

We know that, using equation of motion relating displacement (S), acceleration (a), initial velocity (u) and final velocity (v), we have:

v^2=u^2+2aS

Expressing in terms of 'a', we get:

a=\frac{v^2-u^2}{2S}

Plug in the given values and solve for 'a'. This gives,

a=\frac{0-9.50^2}{2\times 0.250}\\\\a=\frac{-90.25}{0.5}=-180.5\ m/s^2

Therefore, the acceleration of the player is -180.5 m/s². So, the deceleration is 180.5 m/s².

Now, using the first equation of motion, we have:

v=u+at\\\\t=\frac{v-u}{a}

Plug in the given values and solve for 't'. This gives,

t=\frac{0-9.5}{-180.5}\\\\t=0.053\ s

Therefore, the the collision will last for 0.053 s.

(a) The collision lasts for 0.053 s.

(b) The deceleration is 180.5 m/s².

8 0
3 years ago
A sail boat moves north for a distance of 10 km when blown by a wind 30° east of south with the force of 5.00×10^4 N. how much w
erma4kov [3.2K]
<h3><u>Answer;</u></h3>

a) 5.00 x 10^8 J

<h3><u>Explanation;</u></h3>

The work done to move the sailboat is calculated through the equation;

W = F x d

where F is force and d is the distance.

Substituting the known values from the given above,

                             W = (5.00 x 10⁴ N)(10 km)(1000 m/ 1km)

                                 = 5.00 x 10⁸ J

Thus, the work done is <u>5.00 x 10⁸Joules</u>

7 0
3 years ago
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