A particle with charge −5 µC is located on the x-axis at the point 8 cm , and a second
particle with charge 3 µC is placed on the
x-axis at 6 cm .What is the magnitude of the total electrostatic force on a third particle with charge
7 µC placed on the x-axis at −2 cm ? The
Coulomb constant is 8.9875 × 109 N · m2
/C
2
.
Answer in units of N.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)