Answer:
0.278 rad/s
Explanation:
d = Diameter of space station = 252 m
r = Radius =
g = Acceleration due to gravity = 9.80 m/s²
= angular velocity
Here the centripetal acceleration and the acceleration due to gravity will balance each other
Centripetal acceleration is given by
The angular velocity required would be 0.278 rad/s
initial angular speed is given as 20 rev/second
so it is given as
now it comes to rest after 80 s
now we can use kinematics to find angular deceleration
so angular deceleration is 1.57 rad/s^2
Kinetic energy is related to velocity by:
KE = (1/2)mv^2
solve for mass m
10 = (1/2)m(10)^2
10 = (1/2)m(100)
10= 50m
10/50 = m
1/5 = m
at 20 km/hr
KE = (1/2)(1/5)(20)^2
KE = (1/10)(400)
KE = 40 J
<span>You are further away from the center of the Earth. Your weight depends on the inverse of the distance squared. If you get 0.1% further away, you would weight about 0.2% less.</span>
2H2O2 ------> 2H2O +O2
because we're given one side with 2 hydrogens and 2 oxygens and another sie with 3 oxygens and 2 hydrogens. The hydrogens are balanced but the oxygens are not. You can't make the oxygen a three on the reactants side with a whole number so you multiply by 2.
Now you have 4 hydrogens and 4 oxygens on one side and 4 hydrogens and 4 oxygens on the other :)