Explain three ways in which a campfire transfers energy to the people and air around it. Use the terms radiation, heat,
conduction, and convection in your answer.

Explain vector addition, triangle method and parallelogram method

Name two kinds of practical electric pumps.

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)