Here is your answer

REASON :
We know that
Potential difference, V= W/q
where, W is work done
and, q is magnitude of charge
Given,
V= 9.0 v and W= 45 J
So,
using above relation, we get
9= 45/q
q= 45/9
q= 5 coulomb
HOPE IT IS USEFUL
Answer:
The answer is False.
Explanation:
The Light is a form of energy ( known as luminous energy ) that can be perceived by the human eye, therefore it allows us to see what surrounds us. Light is an electromagnetic radiation that spreads in the form of spherical waves in any space, consequently, it is not a mechanical wave.
Answer:
5m/s/s
Explanation:
10N bc you subtract 10N from 20N and you get 10
a=f/m
F=10N
m=2kg
10/2=5
B) Moving with zero acceleration.
Explanation:
Acceleration is defined as the rate of change of the velocity per unit time:

In a velocity-time graph, this ratio corresponds to the slope of the curve. In fact:
(change in velocity) corresponds to the increase in the y-axis
(change in time) corresponds to the increase in the x-axis
So, acceleration corresponds to the slope of the curve in a velocity-time graph. For cart C, the slope is zero, therefore the acceleration is also zero.
Answer:
(a) The x-component of velocity is 31.55 km/h
(b) The y-component of velocity is 44.92 km/hr
Solution:
As per the solution:
The relative position of ship A relative to ship B is 4.2 km north and 2.7 km east.
Velocity of ship A,
= 22 km/h towards South = 
Velocity of ship B,
= 39 km/h Towards North east at an angle of
= 
Now, the velocity of ship A relative to ship B:



Now,

