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A pion is created in the higher reaches of Earth's atmosphere when an incoming high-energy cosmic-ray particle collides with an atomic nucleus. A pion so formed descends toward Earth with a speed of 0.97c. In a reference frame in which they are at rest, pions decay with an average life of 28 ns. As measured in a frame fixed with respect to Earth, how far (on the average) will such a pion move through the atmosphere before it decays?
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.6 dB. What is the intensity delivered to the eardrum
An object has a kinetic energy of 310 J and a momentum of magnitude 22.1 kg · m/s. Find the mass of the object
An initially motionless test car is accelerated uniformly to 1.20 × 102 km/h in 8.68 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.455 seconds, after which the car is measured to be traveling at 65.5 km/h..
Object A is metallic and electrically neutral, Object B is identical to object A and is also electrically neutral, It is charged by induction so that it acquires a charge of +3.18E-6 C
A beam of unpolarized light (at wavelength 550 nm) is incident normally on the face of a sapphire (Al2O3) crystal which is 1 cm thick. The optic axis of the crystal is at an angle of 60 ? with respect to the normal to the incident face. At the..
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. What is the size of the image of the tree on your retina
A photon has an energy equal to the kinetic energy of an electron with speed, u, which may be close to the speed of light, c. Calculate the ratio of the wavelength of the photon to the wavelength of the electron
A traveler first drives 19.4 km east, then 29.7 km southeast, and finally 9.9 km south. Find the traveler's total displacement
The negative terminals of three batteries (3V, 6V, 9V) are each connected to a 150 ohm resistor. what is the voltage across the gap in the broken wire
A rifle is aimed horizontally at a target 50 m away. The bullet hits the target 2.0 cm below the aim point. What is the bullet's flight time
q1. your toaster has a power cord with a resistance of 0.016 connected in series with a 10.6 nichrome heating element.
To determine the specific heat capacity of lead, you get 500g of lead shot to 100 degrees C and place it in an aluminum calorimeter of mass 250g, what is the specific heat of lead
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