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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 athlete at the gym holds a 3kg steel ball in his hand. His arm is 70 cm long and has a mass of 4kg. What is the magnitude of the torque about his shoulder
A 10 kg dog is standing on scale in an accelerating elevator. If the scale reads 5 kg, what is the acceleration of the elevator
A plane, diving with constant speed at an angle of 40.7° with the vertical, releases a projectile at an altitude of 622 m. How far does the projectile travel horizontally during its flight
Two spherical objects with a mass of 5.89 kg each are placed at a distance of 2.16 m apart. How many electrons need to leave each object
a circular conducting ring is split into two semi-circles. the top half has a positive charge q evenly distributed and
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), each with a mass of 3.27 × 10-25 kg. Determine the radius of the path
A standard 100 (120 ) lightbulb contains a 7.80 -long tungsten filament. The high-temperature resistivity of tungsten is. what is the resistance of a household
There are two identical, positively charged conducting spheres fixed in space. The spheres are 36.2 cm apart, find the initial charge on each sphere
Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. compute the surface temperature of the star
A hollow cylinder of mass 0.141 kg and radius 4.10 cm has a string wrapped several times around it, Find the acceleration of the cylinder
A 0.73-kg mass is hanging from a spring with spring constant 13 N/m. What is the resulting period of the oscillation
You would like to slow down your aging process by traveling very fast relative to Earth on a spaceship. What is the required speed of the spaceship
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