Three tiny charged metal balls are arranged on a straight line. the middle ball is positively charged and the two outside balls are negatively charged. the two outside balls are separated by 20 cm and the middle ball is exactly halfway in between. (hint: draw a picture; in your picture, the distance between the two outermost balls should be 20 cm.) the absolute value of the charge on each ball is the same, 1.93 μcoulombs (the meaning of μ, which is read as "micro", is 10-6). give your answers in newtons.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

Diamond will scratch quartz. true or false