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# dereje T

• ### Microsoft Powerpoint animation?

I created two buttons "A" and "B" and add a song

Song is triggered to play when A is clickedSong is triggered to stop when B is clickedHere comes the glitch If I click "A", song starts playing, then click " B", the song will stop.If I click "A" next, nothing will happen(assuming I had clicked "B" before the song has finished playing.Click "A" second time the song will start playing.Is there a way to fix clicking for the second time(of course if the song has finished I don't need to click it two times)

• ### Aerodynamics, planes?

"If the lift to drag ratio is 10:1

In other words it would lose 1 mile altitude for every 10 miles it moves forward"I Didn't quite get the statement, brief explanation needed.

• ### Cars, Brakes, Tandem Master cylinder?

What is the purpose of the replenishing port??

What could happen if it only had vent port??

you can view the picture from the link below

https://www.freeasestudyguides.com/brake-master-re...

Toyota9 months ago
• ### Tennis,Tie breaks..?

Australian open 2020, 5th set between the Swiss and Aussie Why didn't the game end at 8-4 but at 10-8??

• ### Help on HVAC system and refrigeration?

Let's say we have an r134a new refrigerant cylinder which i believe is in a liquid and vapour state.

Since the two states exist we can say it's at saturation.

So what ever the room temperature is, it's the r134a temperature inside the cylinder(if I'm correct)

Assuming the room temp is 25°c, the saturation pressure corresponding to it is 6.4atm

The boiling temp of r134a is -26.3°c at 1atm

Here comes my confusion, if I open the cap and release some of the refrigerant then close it, will the pressure drop??

If so, how do i read the corresponding pressure on the chart??since there is no change in the room temperature and I'd have to go to the chart with the same 25°c (I just don't get the science I believe)

• ### C02 fire extinguishers...filling &construction?

The C02 gas is stored in liquid form inside the cylinder under high pressure right??

if it is all liquid how is the pressure stored inside so when we squeeze the handle the liquid can escape to the atmosphere (from my understanding a gas has to be present or does it??)

• ### English question.....what does "That couldn't be any less true" mean?

4 AnswersWords & Wordplay5 years ago
• ### Mathematics/physics walking at 4 km/hr,a man reaches his office 5 minutes late...?

Walking at 4 km/hr, a man reaches his office 5 minutes late. If he walks at 5 km/hr he will be 2.5 minutes early. What is the distance of his office from his house?

(A) 2.5 km (B) 3 km

(C) 5 km (D) 8 km

• ### If the cube roots of unity are 1, ω, ω2, then the roots of equation (x – 1)3 + 8 = 0 are;?

(A) -1, 1+ 2ω, 1 + 2ω2 (B) -1, 1 - 2ω, 1 - 2ω2

(C) -1, -1, -1 (D) None of these

how the hell would i solve this q?

• ### Three-phase alternators are invariably Y-connected because?

Three-phase alternators are invariably Y-connected because

A) magnetic losses are minimized

B) less turns of wire are required

C) smaller conductors can be used

D) higher terminal voltage is obtained

• ### Electricity,three-phase alternators?

Three-phase alternators are invariably Y-connected because

A) magnetic losses are minimized

B) less turns of wire are required

C) smaller conductors can be used

D) higher terminal voltage is obtained

• ### probability question?

An article manufactured by a company consists of two parts X and Y. In the

process of manufacture of part X, 9 out of 104 parts may be defective. Similarly, 5

out of 100 are likely to be defective in the manufacture of the part Y. Calculate the

probability that the assembled product will not be defective.

(A) 361/416 (B) 95/104

(C) 19/20 (D) None of these

• ### chemistry,Energy,Thermodynamcis?

Which of the parameters is same for molecules of all gases at a given

temperature

A)Mass

B)Speed

C)Momentum

D)Kinetic energy

• ### English choose the best answer?

PETE: Oh, I'd say there must be _______ pieces.However, only _______ are

really worth the high prices they are asking

A) many, few

B) several, a few

C) much, little

D) a lot, some

5 AnswersWords & Wordplay8 years ago
• ### english,what is the opposite of "now"?

What's the opposite of now?

A) Always

B) Never

C) Then

D) Soon

9 AnswersWords & Wordplay8 years ago
• ### calculations in chemistry?

What mass of NaOH (s) is required to react exactly with 25 ml of 0.3M H2SO4 (aq)?

a) 0.6 gr b) 2.4 gr c) 0.3 gr d) 1.2 gr

• ### calculations in thermodynamics?

2.5 kg of brass of specific heat 0.39kJ/kgK at a temperature of 176 C  is dropped into 1.2 liters of water at 14 C 

. The resultant temperature of the mixture is:

• ### When salt water is allowed to evaporate in an open container, what happens to the concentration of salt in th?

When salt water is allowed to evaporate in an open container, what happens to the

concentration of salt in the water?

a) It remains constant throughout the process.

b) It increases or decreases depending on the temperature of the water.

c) It decreases.

d) It increases