the formula for velocity is:
v= distance/time
distance= 80m
time=2 seconds
v=80/2
v=40ms-1
Answer:
T = 37.08 [N*m]
Explanation:
We must remember that torque is defined as the product of a force by a distance. This distance is measured from the point of application of force to the center of rotation of the rotating body.
The force is equal to the product of mass by gravitational acceleration.
![F=m*g\\F=70*9.81\\F=686.7[N]](https://tex.z-dn.net/?f=F%3Dm%2Ag%5C%5CF%3D70%2A9.81%5C%5CF%3D686.7%5BN%5D)
Now the torque can be calculated:
![T=F*r\\T=686.7*0.054\\T=37.08[N*m]](https://tex.z-dn.net/?f=T%3DF%2Ar%5C%5CT%3D686.7%2A0.054%5C%5CT%3D37.08%5BN%2Am%5D)
B will be the answer ( Radiation)
Answer:
Electric field, E = 936.19 N/C
Explanation:
It is given that,
Charge 1, 
Charge 2, 
Distance between them, d = 3 mm = 0.003 m
Torque, 
Angle between electric field and line connecting the charge, 
We need to find the torque exerted on the dipole. The torque experienced by the dipole in the electric field is given by :

p is the dipole moment, 



E = 936.19 N/C
So, the magnitude of electric field on the dipole is 936.19 N/C. Hence, this is the required solution.
Answer:
a. 
b. 
c. 
Explanation:
Given:
- temperature of the hotter reservoir,

- temperature of the colder reservoir,

- heat absorbed by the engine,

- heat rejected to the cold reservoir,

- time duration of the energy transfer,

<u>Now the work done by the engine:</u>
Using energy conservation,



a.
<u>Hence the power output:</u>



b.



c.
now actual efficiency:


