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A pion is an unstable particle that has an average lifetime of 2.55 × 10-8s. This is the time interval between its creation in a nuclear process and its extinction into decay products, as measured in a frame of reference at rest with respect to the pion. An "average" pion is traveling at 0.270c relative to Earth. How far does it travel in its lifetime, relative to Earth?
On an essentially frictionless horizontal ice-skating rink, a skater moving at 2.6 m/s encounters a rough patch that reduces her speed by 48 % to a friction force that is 20 % of her weight
A 12-V battery causes a current of 0.85A through a resistor. How many joules of energy does the battery lose in a minute
A point charge with charge q1 = 2.80?C is held stationary at the origin, How much work W is done by the electrostatic force on the moving point charge
(a)For a satellite to be in a circular orbit 660 km above the surface of the earth, what orbital speed must it be given (b)What is the period of the orbit (in hours)
A pilot claims to have seen a UFO moving initially at the speed of about 440 m/s in an easterly direction and then, in a tie interval of only 1.0s turning 45 degrees and moving souutheast at 440 m/s
A square coil of wire of side 3.00 cm is placed in a uniform magnetic field of magnitude 2.50 T directed into the page, find the average current induced in the coil during this rotation
A solenoid 1.30 m long and 2.70 cm in diameter carries a current of 12.0 A. The magnetic field inside the solenoid is 15.0 mT. Find the length of the wire forming the solenoid
Again assume that the giraffe's blood vessel has a pressure of 400 Torr at the bottom. What is the Young's modulus of the blood vessel's walls
The speed of a sound in a container of hydrogen is 201K is 1220m/s. what would be the speed of sound if the temperature were raised to 405K? suppose that hydrogen behaves like an ideal gas.
Calculating plants maximum possible thermal and actual efficiency.
A power station with an efficiency of 0.5 generates 10^8W of electric power and dissipates 1.00 x10^8 W of thermal energy to the cooling water that flows through it.
For a string stretched between two supports, two successive standing-wave frequencies are 505Hz and 630Hz . There are other standing-wave frequencies lower than 505Hz and higher than 630Hz.
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