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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?
What actually causes a Cepheid to vary in apparent brightness?
M NH3, a basic solution, cannot be found on the reagent shelf, but 6 M NaOH, also a base, is available. What would be observed if the 6 M NaOH is substituted for the 6 M NH3 in testing the reference solution. Explain.
A solenoid has a cross-sectional area of 7.0 x 10-4 m2, consists of 430 turns per meter, and carries a current of 0.52 A. Find the average current induced in the coil
What is the maximum electric field magnitude between the cylinders?
A uniform magnetic field of 25 mT magnitude points in the direction of . Calculate the amount of voltage induced if measured at the ends of the wire
If a reference solution is made acidic instead of basic, how would this change the composition of a precipitate and test for precipitating CO32-
A pendulum of length 2.0 m is held out to point A
FeS(s) dissolves by the addition of HNO3 in a manner similar to that of CuS(s). In the process, the Fe2+ ion is oxidized to Fe3+ ion. Write an equation for this reaction.
What is the amount of total assets at the end of the accounting period and what is the amount of revenue reported on the income statement
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 6.0 cm mark, What is the mass of the meter stick
a gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
Two parallel plates 0.600cm apart are equally and oppositely charged. An electron is released from rest at the surface of the negative plate and simultaneously a proton is released from rest at the surface of the positive plate. How far from the n..
A car is driven 175km west and then 55km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
The aim is to find the woman's position when thebeam begins to tip.
An airtight box has a removable lid of area 2.46 × 10-2 m2 and negligible weight. find the magnitude of the force required to pull the lid off the box
a 145 Kg football player applies a force of 520 N horizontally on the opposing 125 Kg quarterback, How much work did the tackler do while pushing
An electric force of 4.0 N exists between two objects separated from each other by a distance of r. If the distance is decreased to 0.50 r, compute the magnitude of the force between the two objects.
In a certain region of space, the electric potential is given by V= 6y. The potential V is given in volts, the coodinate y is given in meters. Find the direction of the electric field
A 0.75 mm diameter copper wire carries a small current of 3.5 µA. What is the drift speed of the electrons in the wire
A current loop, carrying a current of 3.0 A, is in the shape of a right triangle with sides 30, 40, and 50 cm. Find the magnetic dipole moment of the loop
A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road, How far has the bicyclist traveled during the entire trip and What is the average speed of the bicyclist for the trip
Consider an electron in a hydrogen atom, which is 0.050 nm from the proton in the nucleus, What electric field does the electron experience
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