Answer:
The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
Solution :
Given two resistors : and where >
When the resistors are connected in series :
Current, .............(1)
When the resistors are connected in series :
..................(2)
Therefore, dividing equation (2) by (1), we get
Now, since , we have
∴
Solving, we get, r = 0.127
Given
Initial velocity:
36 ft/s
Initial height:
0 ft
Vertical motion model:
h(t) = -16t^2 + ut + s
v = initial velocity
s = is the height
Procedure
We are going to use the model provided for the vertical motion.
We know that at the maximum height the final velocity is 0.
Then we will use the following expression to calculate the maximum height:
Now for time:
Solving for t,
The total time the kangaroo takes in the air is 2.3s.
A)The speed of the rider is 2.6m/s
B)The rider's radial acceleration is
C)The radial acceleration when the time for one rotation is halved is
Explanation:
Time for one rotation t=6s
speed is the rate of change of distance with time.
to calculate the distance we have to find the circumference of the ride
A)
B)
C)If the time of rotation is halved, speed/velocity as well as the radial acceleration changes.
new time t'=3s
new velocity v'=circumference/t'=15.4/3=5.13 m/s