All organisms in kingdom animalia are multicellular, meaning their bodies are composed of more than one cell. which other characteristic is common to organisms in this kingdom?
a.
all have a backbone.
b.
all are able to survive in water.
c.
all need to get food from an outside source.
d.
all take in oxygen through their gills.
and
which of these organisms are vertebrates in kingdom animalia?
choose all answers that are correct?
a.
worms
b.
frogs
c.
clams
d.
fish

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?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f