A clean machine is a ______________

A block of mass 0.75 kg is suspended from a spring having a stiffness of 150 N/m. The block is displaced downwards from its equi

olganol [36]

Answer:

a)f=2.25 Hz

b)Time period T=.144 s

c)tex]V_{max}[/tex]=0.42 m/s

d)Phase angle Ф=87.3°

e) $a_{max}=6.0041 [tex]\frac{m}{s^2}$

Explanation:

a)

Natural frequency

$\omega _n=\sqrt {\dfrac{K}{m}}$

$\omega _n=\sqrt {\dfrac{150}{0.75}}$

$\omega _n$ =14.14 rad/s

w=2πf

⇒f=2.25 Hz

b) Time period

$=\dfrac{2π}{\omega _n}$

T= $\frac{1}{f}$

Time period T=.144 s

c)Displacement equation

$x=Acos\omega _nt+Bsin\omega _nt$

Boundary condition

t=o,x=0.03 m

t=0,v=.02m/s , V= $\frac{dx}{dt}$

Now by using these above conditions

A=0.03,B=0.0014

x=0.03 cos14.14 t+0.0014 sin14.14 t

⇒x=0.03003sin(14.14t+87.3)

$V_{max}=\omega_n X_{max}$

$V_{max}=14.14\times 0.03003$ =0.42 m/s

d)

Phase angle Ф=87.3°

e)

Maximum acceleration

$a_{max}=(\omega _n )^2X_{max}$

$a_{max}=(14.14)^20.03003$ =6.0041 $\frac{m}{s^2}$

3 0

3 years ago

Read 2 more answers

True or False: Conditions, like the number of times repeated, are used to end a [Repeat] block.

Alja [10]

Answer:

True. needa type in 20 more letters

Explanation:

ye.

4 0

3 years ago

Ashrae standard 15 -2013 require that each machinery room activate an alarm and mechanical ventillation?

Kobotan [32]

ASHRAE Standard 15 - 1994 requires that each machinery room must activate an alarm and mechanical ventilation before refrigerant concentrations exceed the TLV-TWA (Threshold Limit Value - Time Weighted Average).

<h3>What is ASHRAE Standard 15 - 1994?</h3>

The key standards guiding refrigerant identification and usage developed by ASHRAE have been revised to comply with government regulations and achieve improved performance.
Standards 15 and 34 provide critical guidance to manufacturers, design engineers, and operators who must stay up to date on new air conditioning and refrigeration requirements.
Standard 34 describes a shorthand method of naming refrigerants and assigns safety classifications based on toxicity and flammability data, whereas Standard 15 establishes procedures for operating equipment and systems when those refrigerants are used.
Before refrigerant concentrations exceed the TLV-TWA, each machinery room must activate an alarm and mechanical ventilation, according to ASHRAE Standard 15 - 1994 (Threshold Limit Value - Time Weighted Average).

Therefore, ASHRAE Standard 15 - 1994 requires that each machinery room must activate an alarm and mechanical ventilation before refrigerant concentrations exceed the TLV-TWA (Threshold Limit Value - Time Weighted Average).

Know more about ASHRAE Standard here:

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The correct question is given below:
ASHRAE Standard 15 - 1994 requires that each machinery room must activate an alarm and mechanical ventilation before refrigerant concentrations exceed:

5 0

2 years ago

The Micro:bit is considered a what?

Scrat [10]

Sorry need points I'm new

3 0

3 years ago

A square hole is to be cut using ECM through a plate of low alloy steel that is 12 mm thick. The hole is 35 mm on each side, but

yan [13]

Answer:

Time to machine is 348.5secs

Explanation:

The ECM means Engine Control Module (ECM) it can also be called the Engine Control Unit (ECU), it makes sure that your vehicle operates at optimal performance. The ECM also monitors most of the sensors in the engine bay in thereby managing your vehicle’s air-fuel mixture and regulate the emission control systems.

Please Go through the attached files for step by step solution for the answer to first.

6 0

3 years ago

A clean machine is a _______________ machine.