Football game customarily begins with a coin toss to determine who kicks off. the referee tosses the coin up with an initial speed of 5 m/s. in the absence of air resistance, how high does the coin go above its point of release? hint: draw the co-ordinate system. note that the object is moving upwards, but the acceleration is downwards. they will have opposite signs, unline the rock in the well problem done in class where the rock fell in the downward direction and the velocity and acceleration were in the same direction.

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

Explain why electric current cannot exist if a current doesn't have a voltage source.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little