Answer:
A.It is a binomial variable with mean 17 transformers and standard deviation transformers.
Explanation:
Since the good electrical transformers operate at approximate 85% of the total time and 20 electrical transformers are chosen at random. Assuming the variable is a binomial variable. We have:
Mean = number of samples * probability
Standard Deviation =
mean = 85% * 20 = 0.85*20 = 17 transformers
Standard deviation = transformers.
Thus, the random variable is a binomial variable.
Answer:
Explanation:
Here we can use energy conservation for two positions of the gymnast
When she is at the lowest position of the trampoline then its potential energy will convert into gravitational potential energy at the top
So we will have
so we have
now when she stands on it
then by force balance we will have
Answer:
Explanation:
Given that,
Initially, the spaceship was at rest, u = 0
Final velocity of the spaceship, v = 11 m/s
Distance accelerated by the spaceship, d = 213 m
We need to find the acceleration experienced by the occupants of the spaceship during the launch. It is a concept based on the equation of kinematics. Using the third equation of motion to find acceleration.
So, the acceleration experienced by the occupants of the spaceship is .