3. [-18 Points) DETAILS
SERCP11 10.3.P.017.
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The density of lead is 1.13 x 10* kg/m at 20.0°C. Find its density (in kg/m) at 133°C. (Use a 29 x 10-6 (°C) -1 for the coefficient
figures.)
linear expansion. Give your answer to at least four significant
HINT
kg/m2

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?

Rohit is trying to tune an instrument

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in