Since acceleration = Vf- Vi/t
Vf = 75m/s
Vi = 30m/s
Then acceleration = 75-30/5
= 9m/s.
Answer:
Explanation:
k = Coulomb constant = 
r = Distance between charges = 2 cm
The electric force is given by
Also
The sum of the force is given by
Thus 
.
The negative sign is because the force points downward which is taken as negative
Answer:
Air.
Explanation:
To know which option is correct, let us consider the relationship between velocity and the wavelength of a wave. This is illustrated below:
Velocity, wavelength and frequency are related by the following equation:
Velocity = wavelength × frequency
v = λf
From the equation above, we can see clearly that the velocity is directly proportional to the wavelength.
This means that an increase in the wavelength will lead to an increase in the velocity and also, a decrease in the wavelength will lead to a decrease in the velocity.
Now, considering the table given in the question above, we can see that the wave has a higher speed in air. This simply means that the wave will also have a higher wavelength in air.
Thus, the correct answer to the question is: air
Option C. inferential statistics
Trying to reach conclusions that extend beyond immediate data alone. This is used also in making judgments of the probability that an observed difference between groups is a dependable one. Therefore, using this is to arrive an inferences from our data in a more general conditions.
An alpha particle is identical to a helium nucleus ... 2 protons, 2 neutrons. <em>(1)</em>
