On Earth, gravity increases the speed of a falling object by about 9.8 m/s
every second that it falls.
In 0.4 second, its speed increases by (0.4 x 9.8) = 3.92 m/s.
If it just rolled off of the shelf at the beginning of that 0.4 second, then it
started from zero speed, and its speed after 0.4 second is 3.92 m/s.
Its velocity is 3.92 m/s downward.
Answer:
200 C
Explanation:
Let C1 and C2 be their charges. According to Coulomb's law
where k = 
is the constant, R = 0.4m is the distance between them, F = 120 N is their resulting charge force
Since their total charge is 200C:
or 
We can substitute the above equation
or 
So the larger charge is C = 200 C
Answer:
Specific heat of water is 4.186 J/g/C. The heat required to raise the temperature by
is
Here is mass of water being heated, specific heat of water and change in temperature.
Here .
Heat energy required is
Explanation:
Pressure is the amount of force exerted on an object and force is strength or energy of an action
