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Observe yourself breathing and count the number of times you inhale per second. During each breath you probably inhale 0.58L of air. Assume the pressure is 1 atm and the temperature is 20°C. Only about 21% of air is O2. How many oxygen molecules do you inhale if you are at sea level?
The ultracentrifuge is an important tool for separating and analyzing proteins in biological research. If the samples are 11 cm from the axis if the rotor and the ultracentrifuge spins at 6.5×10^4 rpm, what is the magnitude of the net force on the ..
In a He+ ion, the electron is in 3S state Assume that units can be chosen that a = 4 ? ?0 h2 / (M e2) = 1, write down the corresponding wavefunction
A 4.5 %u03BCF capacitor initially has a charge magnitude Q = 2.0 x 10-8 C. What is the total energy stored in the capacitor
A ball is dropped from rest from the top of a building of height h. What is the height of the two balls when they are passing
An 18.00 g rifle bullet travelling 250 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement.
A 10.0 kg block is to be projected across a rough horizontal floor by means of a compressed spring device. What is the work done by friction, in joules, as the block slides to a stop
An event occurs at x′ =60m, t′ =8×10-8 sec in a frame S′ (with y′ =0, z′ = 0). The frame S′ has a speed of 3c/5 in the x direction with respect to frame S. The origins of S and S′ coincide at t = 0, t′ = 0. What are the spacetime coordinates of th..
A 5.8 box is on a frictionless 39 slope and is connected via a massless string over a massless, frictionless pulley to a hanging 1.9 weight. Illustrate what is the tension in the string once the box begins to move?
A car moves with an initial velocity of 5m/s and is subjected to a deceleration of 3m/s2 for 2 seconds. Calculate the distance the car traveled
A high-voltage transmission line with a resistance of 0.33 omegacap.gif/km carries a current of 1040 A. compute the power loss due to resistance in the line
How long must a 0.70-mm-diameter aluminum wire be to have a 0.48A current when connected to the terminals, What is the current if the wire is half this length
What is the coefficient of kinetic friction
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