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The number of radioactive nuclei in a particular sample reduces over a period of 10 d to one-sixteenth the original number.
What is the half-life of these nuclei?
q1. a rightward force of 302 n is applied to a 28.9 kg crate to accelerate it across the floor. the coefficient of
Use conservation of energy to calculate the speed of the alpha particle at infinity. m/s (e) If the two protons are released from rest and the alpha particle remains fixed, calculate the speed of the protons at infinity. m/s
what is the volume v of a sample of 4.30 mol of copper? the atomic mass of copper cu is 63.5 gmol and the density of
An organ pipe is open at both ends. It is producing sound at its third harmonic, the frequency of which is 262 Hertz. The speed of sound is 343 m/s. Determine what is the length of the pipe
An ore sample weighs 17.5N in air. When the sample is suspended by a light cord and totally immersed in water, the tension in the cord is 11.2N. Find the total volume of the sample
Binoculars denoted as 7 x 50 have a total magnification of 7 times and objective lenses of 50- mm diameter. What is the focal length of the eyepiece if the objective focal length is 25.5 cm?
An electric motor is rated to have a maximum power output of 0.68 hp. how fast (i.e., at what speed) can it lift the crate
High speed stroboscopic photographs show that the head of a 246 g golf club is traveling at 56.2 m/s just before it strikes a 47.0 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
A 10g pellet shot from a gun is moving horizontally with aspeed of 100m/s when it hits and stops in a 400g woodblock. What is the maximum compression of the spring
According to Kepler's third law, the orbital period T of a planet is related to the radius R of its orbit by T2 R3. What is the planet's orbital period
A thermodynamic system is operated at a constant pressure of 2 atm. What is the new volume of the system
Halley's comet moves about the Sunin an elliptical orbit, with its closest approach to the Sun being0.59 A.U. and its greatest distance being 35 A.U. what is its speed when it isfarthest from the Sun
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