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Measuring physical fitness. You want to measure the "physical fitness" of college students. Give an example of a clearly invalid way to measure fitness. Then briefly describe a measurement process that you think is valid.
A child's water pistol shoots water through a 1.8 mm-diameter hole. If the pistol is fired horizontally 78 cm above the ground, the squirt hits the ground 1.8 m away. What is the volume flow rate through the squirt? Ignore air resistance.
In a lightning bolt, a large amount of charge flows during a time of 2.9 x 10-3 s. Assume that the bolt can be represented as a long, How much charged has flowed during the lightning bolt?
What is the ratio of the force of the father on the baby to the force of Jupiter on the baby? Calculate the force on the baby, in newtons, due to Jupiter.
A force of 315N is applied horizontally to a wooden crate in order to displace it 35m across a level floor at a constant velocity. Calculate the initial internal energy of the crate
A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, What is the height of the tower
What is the instantaneous velocity of a freely falling object 14 s after it is released from a position of rest? What is its average velocity through this interval? How far will it fall through this time?
Two astronauts on opposite ends of a space ship are comparing lunches. One has an apple, the other has an orange. What is the final speed and direction of the apple in this case
The eccentricity,e, of the Moon's orbit is 0.0549 and the mean orbital radius rL=(ab)^1/2 is 384,100 km. Calculate the lengths of the principal axes a and b of the Moon's orbit. How far is the center of Earth from the center of the elliptical orbit? ..
A bungee cord is stretched between two poles with a force of 407 N. What is the velocity of a wave on this bungee cord
You throw a ball straight down from an apartment balcony to the ground below. The ball has an initial velocity of 4.95 m/s, Find the height of the balcony
A uniform ring of mass 3 kgand radius 5m is rotating about its axis of symmetry withan angular speed of 2 rad/s. How much work is required tobring it to rest
You are standing at the rear end of a raft that is 6.0 m long. The raft has a uniform mass of 120 kg and is at rest on a lake. how far are you from the end of the pier
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