Answer: In summary, work is done when a force acts upon an object to cause a displacement. Three quantities must be known in order to calculate the amount of work. Those three quantities are force, displacement and the angle between the force and the displacement.
Explanation:
Answer:
The Greek philosophers leucippus and Democritus
Answer:
They are correct
Explanation:
According to the uncertainty principle, the uncertainty in the position of an object is directly proportional to its De Broglie wavelength.
The De Broglie wavelength of a baseball is about 
, recall that the diameter of the atom is about to 
. Thus, the error in simultaneously determining the position and momentum of a baseball is infinitesimally small.
Answer:
it looks like dots and just black space on a large scale
Explanation:
on a large scale the universe especially our milky way looks small
hope this helps
Answer:
(i) The velocity in the pipe is 0.71 m/s
(ii) A pipe diameter of 0.0029 m (0.29 cm) should be used
Explanation:
(i) Velocity (V) = Reynolds number × viscosity/density × diameter of pipe
Reynolds number = 1300
Viscosity = 0.21 Pa.s
Density = 855 kg/m^3
Diameter of pipe = 45 cm = 45/100 = 0.45 m
V = 1300×0.21/855×0.45 = 0.71m/s
(ii) Pipe diameter (D) = Reynolds number × viscosity/density×velocity
Reynolds number = 1300
Viscosity = 0.0015 Pa.s
Density = 955 kg/m^3
Velocity = 0.71 m/s
D = 1300×0.0015/955×0.71 = 0.0029 m (0.0029×100 = 0.29 cm)
