Which of the following is an advantage of a non-dimensional number? select all that apply. a)-it expresses the functional relationship between the variables in dimensionless terms b)-it reduces the number of variables involved in a physical phenomenon. c)-the design curves can be developed trom experimental data or direct soution of the problem. d)-it allows to compare different systems by simpitying the problems in dimensionless forms

To travel at constant speed, a car engine provides 24kw of useful power. the driving force on the car is 600n. at what speed does it travel?

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?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?