Spring has an unstretched length of 0.40 meters. The spring is stretched to a length of 0.60 meters when a 10.-newton weight is hung motionless from one end. The spring constant of this spring is:

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=