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A person is exercising, burning 550 Cal/hr. While doing this exercise, they breath deeply so the volume they take into and out of their lungs is 3 L with each breath. 20% of the air inhaled is oxygen, and 16% of the air exhaled is oxygen. How fast do they have to breath?
An air-track glider attached to a spring oscillates between the 12.0cm mark and the 61.0cm mark on the track. find maximum speed of the glider
A wheel rotates about a fixed axis with an initial angular velocity of 25 rad/s. During a 4.0-s interval the angular velocity decreases to 10 rad/s. How many radians does the wheel turn
A transverse pulse moves along a stretched cord of length 5.55 m having a mass of 0.130 kg. If the tension in the cord is 13.6 N, find the wave speed
You have a simple pendulum that's 1.4m long and has a 100g mass at the end. In Lewis Hall, what is the period of the pendulum? You then take this pendulum to the moon and measure the period again. What is the new period? Moon gravity is one sixth of ..
You need to produce a solenoid that has an inductance of 2.17 ?H. How long, in centimeters, should the tube be
A car travels at 90.0km/h for a distance of 500m. find the tangential speed of the perimeter of each tire
A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by the rope inclined at 20.4° above the horizontal. The sledge moves a distance of 20.7 m on a horizontal surface. The coefficient of kinetic friction between ..
a ball of mass 0.203 kg has a velocity of 1.43 ms right a ball of mass 0.291 kg has a velocity of 0.396 ms left. they
a wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 38 at 20degc. if its resistance increases
A person stands at a point,241 min front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard
Calculate the wavelength of light emitted by a hydrogen atom when an electron makes a transition from n=8 to n=2 levels
Two identical uniform poles of mass 50 kg and linear mass density 15 kg/m are supported by pivots 2 m apart on level ground. what angle do the poles make with the vertical
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