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The molar mass oxygen gas is 32.0 x 10^-3 kg/mol. If the gas is at 21 degrees C, find the root-mean-square speed for an oxygen molecule.
A hydrogen atom initially in its ground state (n =1) absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon
An asteroid is discovered heading straight toward Earth at 14km/s. An international team manages to attach a giant rocket engine to the asteroid. The rocket fires for 10 {rm min}, after which asteroid is moving at 26^circ to its original path at a..
Four point charges have the same magnitude of 2.3 × 10-12 C and are fixed to the corners of a square that is 3.8 cm on a side, Determine the magnitude of the net electric field that exists at the center of the square
A runner travels 2 km north, then 1 km west, then 1 km north, then 3 km east. The run took 45 minutes. What was the total path length of the run
a projectile of mass 0.212kg is shot from a cannon. The end of the cannon barrel is at height 6.4m, the initial velocity of the projectile is 9.3m/s. How long does it take the projectile to hit the ground
The solar constant is the power received from the Sun per unit area perpendicular to the Sun's rays at the mean distance of Earth from the Sun, Calculate the effective temperature of the Sun if it radiates like a blackbody
You are testing a new amusement park roller coaster with an empty car with mass 123 kg. One part of the track is a vertical loop with radius 11.1 m, how much work is done by the friction
A jeweler working with a heated 43 gram gold ring must lower the ring's temperature t make it safe to handle. If the ring is initially at 94 degrees Celsius, what mass of water at 22 degrees Celsius is necessary to lower the ring's temperature to 38 ..
Let the drag force on a ball of mass m moving through air in the gravity-free bubble include both "viscous" drag F1=-kv, Find the velocity v of a ball thrown with initial speed v0.
At what speed does the speed of the ball change relative to the cab floor (sign and magnitude)?
A sphere of mass ofm= 1.40 kg is first placed directly on the plate of an electronic scale. The scale shows 13.73 N as the weight of the object. Calculate the density of the sphere
During a long airport layover, a physicist father and his 8-year-old daughter try a game that involves a moving walkway. With what speed was the girl walking
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