Alight year is the distance that ligth travels in a year.
Answer: C. The distance tat light travels in a year.
Anions: negatively charged atoms
Cations: positively charged atoms (CAT-ions are PAWS-itively charged)
Anode: positively charged electrode that allows electrical current flow (positive end of battery)
Cathode: negatively charged electrode that allows electrical current flow (negative end of batter)
Answer:
The phenomenon of diffraction.
Explanation:
Diffraction of light that resembles the behavior of waves in water made scientists think that light have a wave nature.
Answer:
a)
b)
c)
Explanation:
a) The angular velocity is related to the centripetal acceleration by the formula 
, which for our purposes we will write as:
Since <em>we want this acceleration to be 1.5 times that due to gravity</em>, for our values we will have:
b) 1 rpm (revolution per minute) is equivalent to an angle of 
radians in 60 seconds:
Which means <em>we can use the conversion factor</em>:
So we have (multiplying by the conversion factor, which is 1, not affecting anything but transforming our units):
c) The centripetal force will be given by Newton's 2nd Law F=ma, so on the centripetal direction for our values we have:
t = time of contact of hammer with the nail = 0.4 sec
I = impulse exerted by the hammer on the nail = 32 N s
F = force applied by the hammer on the nail
we know that , impulse is given as
I = F t where I = impulse , F = force , t = time
hence the impulse of hammer on nail is given as
I = F t
inserting the values
32 Ns = F (0.4 sec)
F = 32/0.4
F = 80 N
hence the force exerted by the hammer comes out to be 80 N
