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Ad libitum [116K]

3 years ago

13

Block B starts from rest and moves downward with a constant acceleration. Knowing that after slider block A has moved 400 mm its

velocity is 4 m/s, determine (a) the accelerations of A and B, (b) the velocity and the change in position of B after 2 s.

1 answer:

iris [78.8K]3 years ago

5 0

The answer it’s b because I said so

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I just wanted to say thanks you to Brainly. This website is a huge help!

Fantom [35]

THANKS BRAINLY <3

Explain : I've got a lot of help from this website :D

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3 years ago

Water enters the pump of a steam power plant as saturated liquid at 20 kPa at a rate of 45 kg/s and exits at 6 MPa. Neglecting t

Natasha2012 [34]

Answer:

$\dot W_{in} = 273.69\,kW$

Explanation:

The pump is modelled after the First Law of Thermodynamics. A reversible process means that fluid does not report any positive change in entropy:

$\dot W_{in} + \dot m \cdot (h_{in}-h_{out}) = 0$

The properties of the fluid at entrance and exit are, respectively:

Inlet (Saturated Liquid)

$P = 20\,kPa$

$T = 60.06\,^{\textdegree}C$

$h = 251.42\,\frac{kJ}{kg}$

$s = 0.8320\,\frac{kJ}{kg\cdot K}$

Outlet (Subcooled Liquid)

$P = 6000\,kPa$

$T = 60.06\,^{\textdegree}C$

$h = 257.502\,\frac{kJ}{kg}$

$s = 0.8320\,\frac{kJ}{kg\cdot K}$

The power input to the pump is computed hereafter:

$\dot W_{in} = \left(45\,\frac{kg}{s} \right)\cdot \left(257.502\,\frac{kJ}{kg} -251.42\,\frac{kJ}{kg} \right)$

$\dot W_{in} = 273.69\,kW$

8 0

4 years ago

A piston moves a 25kg hammerhead vertically down 1m from rest to a

UkoKoshka [18]

Answer:

Total change in energy = 31 KJ.

Explanation:

Mass m=25 kg

Height h = 1 m

Initial velocity = 0

Final velocity = 50 m/s

Energy at initial condition

$E_1=mgh+\dfrac{1}{2}mv^2$

$E_1=25\times 10\times 1+0$

$E_1=250\ J$

Energy at final condition

$E_2=0+\dfrac{1}{2}\times 25\times 50^2$

$E_2=31250\ J$

So the change in energy = 31250 -250 J

The total change in energy = 31000 J

5 0

4 years ago

Read 2 more answers

Which of the following are made up of electrical probes and connectors?

Mariulka [41]

Uhm is there a multiple choice?

6 0

3 years ago

Design a 8th order wideband band-pass Butterworth filter with a lower cutoff frequency of 45 Hz, an upper cutoff frequency of 17

Lunna [17]

Explanation:

71hz 45+17+9

5 0

2 years ago