At what point will the electric field of a charged object be strongest? A.
where the electric field lines are perpendicular to the equipotential line
B.
where the electric field lines are farthest apart
C.
where the electric field lines are closest together
D.
where the electric field lines are parallel to the equipotential line

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

Convection currents are caused by differences in what two things?