A3.00 × 10^−9-coulomb test charge is placed near
a negatively charged metal sphere. the sphere
exerts an electrostatic force of magnitude
6.00 × 10^−5 newton on the test charge. what is
the magnitude and direction of the electric field
strength at this location?
(1) 2.00 × 10^4 n/c directed away from the
sphere
(2) 2.00 × 10^4 n/c directed toward the sphere
(3) 5.00 × 10^−5 n/c directed away from the
sphere
(4) 5.00 × 10^−5 n/c directed toward the sphere

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

How can you increase the strength of an electromagnet?

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.