The us consumes about 2.5x1019 joules of energy each year. if a solar flare could produce 1025 joules of energy, for how long could we provide power to the us by harnessing the energy of a single solar flare? also, thinking about that much energy, explain how solar flares can be disruptive to communications on earth.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.