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A 5 minute sample count yielded 500 counts. A 5 minute background measurement gave 125 counts. Assuming negligible radioactive decay of the sample during the counting period, what is the sample net count rate and its 95% confidence interval. Please show your work.
In a classical model of the hydrogen atom, the electron orbits a stationary proton in a circular orbit
A small plastic sphere with a charge of -5.0 nC is near another small plastic sphere with a charge of -15 nC, what is the distance between the spheres
A mass m1 = 1 kg rests on top of a mass m2 = 5 kg which is attached to a spring (k = 50 N/m), Determine the maximum amplitude of the motion such that the top mass does not slip
A nurse measures the temperature of a patient to be 39.3°C. What is this temperature on the Fahrenheit scale
A 3.1 kg dog stands on a 15.00 kg flatboat at distance D = 6.1 m from the shore. It walks 2.00 m along the boat toward shore and then stops. Assume no friction between the boat and the water, find how far the dog is then from the shore.
An object with a net charge of 22 µC is placed in a uniform electric field of 600 N/C, directed vertically. What is the mass of object if it floats in this electric field.
A baseball outfielder throws a 0.150 kg baseball at a speed of 45.0 m/s and an initial angle of 28.0°. Illustrate what is the kinetic energy of the baseball at the highest point of its trajectory?
Find the speed of sound in a thin rod of cast iron, which has a sheer modulus of 4.5 1010 Pa and a density of 7.30 103 kg/m3
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. Calculate the probable percent error in the volume
A 62.9 kg ice skater moving to the right with a velocity of 2.07 m/s throws a 0.193 kg snow- ball to the right with a velocity of 31.6 m/s relative to the ground. What is the velocity of the ice skater
The driver of a car sets the cruise control and ties the steering wheel so that the car travels at a uniform speed of 15m/s in a circle with a diameter of 130m. What arc length does it travel in this time
a 8.2 kg mass hanging from a spring scale is slowly lowered onto a vertical spring.part a what does the spring scale
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