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A boy in a wagon is moving at 3.1 m/s east when another boy begins pulling on the wagon in the direction opposite to its motion at 1.25 m/s^2.
(a) How long does it take to give the wagon a velocity of 7.4 m/s west?
(b) How far from the starting point is the wagon at that time?
you need to determine the density of an unknown liquid. to this end you perform an experiment with a block and notice that the block floats in this unknown liquid with 4.6 cm of its side submerged. determine the density of the unknown liquid
In very cold weather, a significant mechanism for heat loss by the human body is energy expended in warming the air taken into the lungs with each breath. How much heat is lost per hour if the respiration rate is 19.0 breaths per minute
What is the mass of the block on the left. At what rate is the plate's area increasing when the radius is 50 cm? (Give your answer correct to 2 decimal places.)
As you ride your 14-kg bicycle on level ground you do some work against a 30N force of air resistance if your mass is 65-kg.What is power you apply to maintain a velocity of 25-km`.a-on level ground b-going up a 5degrees slope?(remember it's a num..
A converging lens of focal length 7.930cm is 16.6 cm to the left of a diverging lens of focal length -6.0cm. A coin is placed 12.60cm to the left of the converging lens. Determine the location of the coin's final image.
In a television set the power needed to operate the picture tube comes from the secondary of a transformer. Find the current in the primary
In creating his definition of horsepower, James Watt, the inventor of the steam engine, calculated the power output of a horse operating a mill to grind grain or cut wood, Calculate the power output, in hp, of a 72-kg human being
Assuming that the acceleration is uniform when the racquet is applied over a distance of 0.52 m, illustrate what is the magnitude of the force exerted on the ball by the racquet?
It rolls at a steady speed for 1.9 s, then one wheel begins to stick. The train comes to a stop 6.0 m from its starting point. Illustrate what is the train's acceleration after its wheel begins to stick?
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. Based on this measurement, what is the work function for this metal
Physics: Simple Harmonic Oscillator, Traveling waves are set up in a pair of long strings by a simple harmonic oscillator. The strings have identical mass densities of 5.1 grams/meter.
A 4.5 box slides down a 4.7 high frictionless hill, starting from rest, across a 1.6- -wide horizontal surface, afterwards hits a horizontal spring with spring constant 550 . The other end of the spring is anchored against a wall. The ground under..
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