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A radioisotope is placed near a radiation detector, which registers 80 counts per second. Eight hours later the detector registers five counts per second, what is the isotopes half-life?
What is the electric field amplitude at a distance of 24.8 cm from the source - How does the speed of the emerging beam compare to the speed in the glass?
A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 586 N. As the drawingshows, she is closer to the left cliff than to the right cliff,with the result that the tensions in the left and right sid..
A 3.00 kg block starts from rest at the top of a 33.0° incline and slides 2.00 m down the incline in 1.60s. Discover the acceleration of the block. Find the speed of the block after it has slid 2.00 m.
A sound wave has a frequency of 677 Hz in air and a wavelength of 0.50 m. What is the temperature of the air
A bird sitting in a tree is travelling at 40 km/s relative to the faraway Sun. When the bird drops to the ground below, does it still go 40 km/s, or does this speed become zero.
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet, in years
A sample of an unknown material weighs 300 N in air and 200 N when immersed in alcohol. The density of the alcohol is 70% the density of water. determine the volume of the unknown material
Discover the charge if the potential difference between two points that are 4.20 mm from the charge and 8.23 mm from the charge is 220.0V. Using the charge from part a, find the distance from the charge that two points are where the potential dissimi..
varying coefficient of friction a box is sliding with a speed of 4.50 ms on a horizontal surface when at point p. it
A 1.50 meter long steel wire with a diameter of 0.400 millimeter is hanging vertically. Determine how much does the wire stretch
Define the mixture fraction for the non-premixed combustion of the fuel blend specified above. Assuming infinitely fast chemistry, express the mass fraction of the water vapour in terms of the mixture fraction.
A 60.0 cm long organ pipe is filled with air at 15°C and is open at both ends. The velocity of sound in air at 0.000°C is 331 m/s. Another 60.0 cm long organ pipe is filled with air at 25.0°C and is open at both ends. What is the beat frequency betwe..
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