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Physicians use a machine called a spirometer to measure the maximum amount of air a person can exhale (called the forced vital capacity). Suppose you can exhale 4.0L . How many kilograms of air do you exhale? Assume that the density of air is 1.3 kg/m3.
A car (m = 700.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 42.0 m. Find the average power the engine must deliver to reach a speed of 20.3 m/s at the top of the hill in 24.5 s
A monochromatic light source emits a wavelength of 490 nm in air. When passing through a liquid, What is the liquid's index of refraction
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
The cable lifting an elevator is wrapped around a 1.0-m-diameter cylinder that is turned by the elevator's motor. How long does it take for the elevator to stop
It is possible to produce artificial gravity on a space station by having the station rotate. Explain how this would work. What would be some benefits and drawbacks to this approach?
Explain by how much time is required for the bullet to reach the target? Using the approximate value of g = 10 m/s2, how far does the bullet fall in this time?
Intense white light is incident on a diffraction grating that has 720 lines/mm. What is the angular separation between the violet edge (400 nm) and the red edge (700 nm) of the first order spectrum produced by the grating
Two cars are 1.24 miles apart both moving at 62.81 mi/h, How many miles will the trailing car travel before catching up to the lead car
A railroad car of mass 2.5 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
The SI units of mass density are kg/m3, but there are several other common units. One of the most commonly used units of mass density is gram per cubic centimeter, or g/cc. What is the buoyant force on the mass
A satellite moves in a circular orbit around Earth at a speed of 4714 m/s. Determine the satellite's altitude above the surface of Earth
An outfielder throws a 0.150 kg baseball at a speed of 39.6m/s and an initial angle of 34° What is the kinetic energy of the baseball at the highest point of its trajectory.
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