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21

Tuesday, September 8th 2020, 9:24pm

If the taken distance of free falling object is 65 meter in last 1 sec, what is current speed of object?


234 kmh or 145,401 miles per hour
(kind of like good mens tennisserve at US Open atm :smile: )

22

Tuesday, September 8th 2020, 9:43pm

Boiling point decreases as altitude increases
So answer is

1) boil on mountain


Unfortunatly wrong as you chosen the wrong answer, even with argumenting in correct direction.

"If you boil water at a higher pressure (below sea level, for example), the boiling point would be higher than 100 °C . At a lower pressure (like in the mountains), the boiling point is a lower temperature."

As we have a higher boiling point in lower areas the water just gets hotter before
transforming to gas - so egg is cooked faster :embarressed:
Ooh what a trick xd

23

Tuesday, September 8th 2020, 10:01pm

h-->distance
u-->first velocity
v-->last velocity
g-->gravitational acceleration (10 bcs practical xd)
t-->time xd

h=u*t + (g*t*t)/2 (*)

u = 60 m/s (*)

v*v=u*u + 2gh (**)

v = 70 m/s (**)

You can do for g=9,8 if your answer are correct its okay

24

Tuesday, September 8th 2020, 10:12pm

what does the first principle of dynamics say?

also known as the lazy a** principle

25

Tuesday, September 8th 2020, 10:16pm

It says

If there is no net force on an object, then its velocity is constant. Either the object is at rest (if its velocity is equal to zero), or it moves with constant speed in a single direction.

26

Tuesday, September 8th 2020, 10:23pm

correct

27

Tuesday, September 8th 2020, 10:42pm

Water temperature is divided in 0-100 degrees from frozen to boiling.

In how many parts is it divided if you change in Fahrenheit?

a) 100
b) 150
c) 180
d) 200

28

Tuesday, September 8th 2020, 10:45pm

Water temperature is divided in 0-100 degrees from frozen to boiling.

In how many parts is it divided if you change in Fahrenheit?

a) 100
b) 150
c) 180
d) 200
c) 180

29

Tuesday, September 8th 2020, 10:46pm


30

Tuesday, September 8th 2020, 11:13pm

What is the role of KMnO4(potassium permanganate) in redox titration?

31

Tuesday, September 8th 2020, 11:14pm

What is the role of KMnO4(potassium permanganate) in redox titration?

It is an absorbent of toxic gas; Electrolyte purification.It has a role in soil and water treatment remediation.

32

Tuesday, September 8th 2020, 11:18pm

Using as indicator

33

Tuesday, September 8th 2020, 11:20pm

Using as indicator
Correct




Quoted from "--Arya--"



What is the role of KMnO4(potassium permanganate) in redox titration?

It is an absorbent of toxic gas; Electrolyte purification.It has a role in soil and water treatment remediation.
It's true but i asked for redox titration .It's correct too .

34

Tuesday, September 8th 2020, 11:43pm

What are the 3 basic subatomic particles contained in the atom?

35

Tuesday, September 8th 2020, 11:48pm

What are the 3 basic subatomic particles contained in the atom?


Proton, Electron and Neutron

(and from Protons they made Torpedo Weapon in Star Wars :lol: )

36

Tuesday, September 8th 2020, 11:51pm

Correct xd (+1 talent coins for star wars info)

37

Wednesday, September 9th 2020, 12:13am

What is the chemical symbol and atomic number of mercury?

38

Wednesday, September 9th 2020, 12:14am

What is the chemical symbol and atomic number of mercury?


Hg and 80

39

Wednesday, September 9th 2020, 12:15am

What is the chemical symbol and atomic number of mercury?


Hg and 80
Is correct

40

Wednesday, September 9th 2020, 12:29am

Why questions are about chemistry more than physics xddddddddd