Answer:
Explanation:
Let the internal resistance be r .
Since in open circuit the volt is 1.55 V , this will be the source voltage .
Source voltage = 1.55
If external resistance be R .
1.55 / (R + r ) = .500
R + r = 3.1 ohm
So sum of internal resistance and external resistance will be 3.1 ohm.
Answer:
the ball rebounds 8 times before losing 90% of its energy
Explanation:
given information:
height, h₁ = 1.6 m
rebound height, h₂ = 1.2 m
energy loss = 90% = 0.9
first we can calculate the loss energy after the rebound
energy loss = 1 - [(height of rebound/height of the ball)^n
where
n = number of the bounce
energy loss = 1 - (h₂/h₁)^n
0.9 = 1 - (1.2/1.6)^n
(0.75)^n = 1 - 0.9
n log 0.75 = log 0.1
n = log 0.1/log 0.75
= 8 bounces
Answer:
5 kg
Explanation:
PE = KE
mgh = KE
m (9.8 m/s²) (1 m) = 50 J
m = 5.1 kg
Rounded to one significant figure, the mass is 5 kg.
Answer:
a) , b) , c)
Explanation:
a) The net flux through the cube is:
b) The flux through the right face is:
c) The flux through the left face is: