Answer:
In the solid state particles are held closely together and vibrate slightly. They exist in a regular arrangement - there is no regular arrangement in the other states.
Answer:
4 km/hr
Explanation:
suppose 's' is Diane's speed with no current.
't' represents time in hrs.
Using the formula:
Distance = speed 's' x time 't'
-> when she swims against the current, equation will be,
5= (s-2)t
t= 5/(s-2)
->when she was swimming with the current, equation is,
15= (s+2) t
t= 15/(s+2)
equating eq(1) and (2)
5/(s-2) = 15/(s+2)
5s + 10 = 15s - 30
40= 10s
s= 40/10
s=4
Therefore, if there were no current, her speed is 4km/hr
Answer:
The pressure difference in the pipe is 2666 Pa.
Explanation:
Given that,
Height = 12 cm
Angle = 30°
We need to calculate the height
Using formula of height


We need to calculate the pressure difference in the pipe
Using formula of pressure


Where,
= density of mercury
= density of water
Put the value into the formula


Hence, The pressure difference in the pipe is 2666 Pa.