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3 years ago

Examples of reciprocating motion in daily life

Engineering

1 answer:

bonufazy [111]3 years ago

8 0

Answer:

Examples of reciprocating motion in daily life are;

1) The needles of a sewing machine

2) Electric powered reciprocating saw blade

3) The motion of a manual tire pump

Explanation:

A reciprocating motion is a motion that consists of motion of a part in an upward and downwards $(\updownarrow)$ or in a backward and forward (↔) direction repetitively

Examples of reciprocating motion in daily life includes the reciprocating motion of the needles of a sewing machine and the reciprocating motion of the reciprocating saw and the motion of a manual tire pump

In a sewing machine, a crank shaft in between a wheel and the needle transforms the rotary motion of the wheel into reciprocating motion of the needle.

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Which of the following is true regarding screw gauges and shank?

agasfer [191]

correct me if i’m wrong i’m pretty sure it’s B i’ve had the same question

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3 years ago

An open glass tube is inserted into a pan of fresh water at 20 °C. What tube diameter is needed to make the height of capillary

kiruha [24]

Answer:

The tube diameter is 2.71 mm.

Explanation:

Given:

Open glass tube is inserted into a pan of fresh water at 20°C.

Height of capillary raise is four times tube diameter.

h = 4d

Assumption:

Take water as pure water as the water is fresh enough. So, the angle of contact is 0 degree.

Take surface tension of water at 20°C as $72.53\times 10^{-3}$ N/m.

Take density of water as 100 kg/m3.

Calculation:

Step1

Expression for height of capillary rise is gives as follows:

$h=\frac{4\sigma\cos\theta}{dg\rho}$

Step2

Substitute the value of height h, surface tension, density of water, acceleration due to gravity and contact angle in the above equation as follows:

$4d=\frac{4\times72.53\times10^{-3}\cos0^{\circ}}{d\times9.81\times1000}$

$d^{2}=7.39\times10^{-6}$

$d=2.719\times10^{-3}$ m.

$d=(2.719\times10^{-3}m)(\frac{1000mm}{1m})$

d=2.719 mm

Thus, the tube diameter is 2.719 mm.

5 0

4 years ago

13–27. The conveyor belt is moving downward at 4 m>s. If the coefficient of static friction between the conveyor and the 15-k

Feliz [49]

Answer:

See explanation for step by step procedure to get answer.

Explanation:

Given that:

The conveyor belt is moving downward at 4 m>s. If the coefficient of static friction between the conveyor and the 15-kg package B is ms = 0.8, determine the shortest time the belt can stop so that the package does not slide on the belt.

See the attachments for complete steps to get answer.

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4 years ago

This problem has been solved!

lisov135 [29]

Answer: a) 135642 b) 146253

Explanation:

1- the bankers algorithm tests for safety by simulating the allocation for predetermined maximum possible amounts of all resources, as stated this has the greatest degree of concurrency.

3- reserving all resources in advance helps would happen most likely if the algorithm has been used.

5- Resource ordering comes first before detection of any deadlock

6- Thread action would be rolled back much easily of Resource ordering precedes.

4- restart thread and release all resources if thread needs to wait, this should surely happen before killing the thread

2- only option practicable after thread has been killed.

Bii) ; No. Even if deadlock happens rapidly, the safest sequence have been decided already.

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3 years ago

20-tooth spur pinion has a diametral pitch of 6 teeth/inch and a quality standard of No 6. When the pinion rotates at 1150 rev/m

zimovet [89]

Answer:

See explaination

Explanation:

From the following,(see attachment) we have the values of factor of safety for both cases

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We have taken the preliminary design approach as we don't have enough data and a quality standard of 6 for pinion is provided to distract us to go for final design approach.

But as we are not aware about the quality standard for gear, face width, power, etc so it is not possible to go with final design approach

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3 years ago