19 dm expressed in millimeters
1 answer:
You might be interested in
Answer:
The answer to your question is the second graph (the one attached).
Explanation:
We have to look for the graph that represents the data given.
a) The first graph is not correct because we look for a distance of 20 m, and this graph only goes from 0 to 10 m.
b) this graph is correct because it covers the distance (20 m) and the time (4 s)
c) This graph could be the right ooption but it is coming back and we look for a forward progress, then this graph is incorrect.
d) This graph shows that the dog is not moving, so this option is wrong.
Answer:
(a) 1000 N/C
Explanation:
Kinetic energy of electron, K = 1.6 x 10^-17 J
distance, d = 10 cm = 0.1 m
Let the potential difference is V and the electric field is E.
(a) The relation between the kinetic energy and the potential difference is
K = e V
V = K / e
Where, e be the electronic charge = 1.6 x 10^-19 C
V =
V = 100 V
The relation between the electric field and the potential difference is given by
V = E x d
100 = E x 0.1
E = 1000 N/C
(b) The force acting on the electron, F = q E
where q be the charge on electron
So, F = -e x E
It means the direction of electric field and the force are both opposite to each other.
The direction of electric field and the force on electron is shown in the diagram.
