Answer:
The correct option is B
Explanation:
In part A pressure is given as 
In Part B we can calculate the pressure using the formula
Where F is the force which in this case is weight which can be obtained as follow
W = Mg
Substituting 70kg for M and 
for g
A is the area with a value 
So substituting into the above equation
for part c
A 
F 
Therefore 
From this we see that the value of P for part B is the greatest
Answer: 3 m/s
Explanation:
The average velocity is simply the change in displacement over the specified time interval. I’m this case, we have a total of four intervals,which represent 4 seconds. Dividing 12 m by 4s gives us 3 m/s
The correct answer is option 2. Systems, by
nature, tend to undergo changes toward higher entropy and lower energy since
this is the state where they are most stable. Entropy is the degree of
disorderliness of a substance. Systems tend to go to higher disorder since
systems always tend to change which can be linked to disorder and is
inevitable.
Answer:
The current needed to transmit Power of 4 W is 28.47 A
Solution:
As per the question:
Length of the antenna, 
Frequency, 
Power transmitted, 
Now,
For a monopole antenna:
where
= wavelength transmitted by the antenna
c = speed of light in vacuum
Now,
Since, the value of >> 
thus the monopole is a Hertian monopole.
The resistance is calculated as:
Now, the current I is given by:
Answer:
Explanation:
Given data:
particle mass = 0.923 g
particle charge is 4.52 micro C
speed of particle 45.7 m/s
In this particular case, coulomb attraction will cause centrifugal force and taken as +ve and Q is taken as -ve
solving for Q WE GET
where
