Answer:
C. 500 watts
Explanation:
power is defined as the rate of work done
When a force causes a object to move, work is being done on the object by the force.
Answer:
A, C, E
Explanation:
I put this and got it right.
Units and Numbers
In order to determine an object’s speed on a Speed vs. Time graph, the axes MUST be labeled with United and numbers.
Answer:
The velocity is
Explanation:
From the question we are told that
The speed of the roller coaster at ground level is
Generally we can define the roller coaster speed at ground level using the an equation of motion as
u is zero given that the roller coaster started from rest
So
So
=>
Now the displacement half way is mathematically represented as
So
Where is the velocity at the half way point
=>
=>
here we have to calculate the net positive charge present on he surface of the conducting sphere.
as the sphere is a conducting one the,the charge will be stored on its surface.
though the charge is present at the surface,still it will behave just like the total charge is concentrated at the centre of the sphere.
the electric field at outside of the sphere is E=
as E=
so V=
here V=27 volt,radius of sphere is 0.800 m and the point at which the potential is considered is at 1.20 m from th centre of the sphere.hence the point is at the outside of the sphere .
hence we have 27=
q=27× coulomb
=3.6× coulomb [ans]