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1. Which of the following compounds are insoluble in water?PbSO4 ,Be(OH)2 ,Mg(NO3)2 ,AlPO4 ,NH4I ,All are insoluble
2. What is the percent-by-mass, %(m/m), concentration of Na2SO4 in a solution made by dissolving 15.8 g of Na2SO4 in enough water to give 87.1 g of total solution?
3. How many grams of glucose (C6H12O6) are there in 257.15 mL of a 21.68 %(m/v) glucose-water solution?
A sample has a activity of 0.0021 Bq per gram of carbon. Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq
For a damped oscillator with a mass of 350 g, a spring constant 59.00 N/m and a damping coefficient of 89 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 30 cycles.
Calculate the angular momentum of the Earth about its own axis, due to its daily rotation. Assume that the Earth is a uniform sphere
In the 1994 movie Speed, a bus wired with explosives must maintain a speed of 50mph or the bus will explode. what is the minimum launch angle required for the jump to be successful
A diver observes a bubble of air rising from the bottom of a lake to the surface, What is the ratio of the volume of the bubble as it reaches the surface to its volume at the bottom
How long does it take the projectile to reach the top of its trajectory? Explain how high does the projectile go before it begins to fall?
An object is so = 2 m from the front side of a converging lens with focal length f1 = 1 m, Draw a ray diagram of the situation, Where is the final image now, What is the new magnification
Antimony (atomic number 51) is composed of two principal isotopes, antimony-121, which has a mass of 120.904 atomic mass units, What is the atomic mass of natural antimony?
A worker stands still on a roof sloped at an angle of 21° above the horizontal. He is prevented from slipping by a static frictional force of 400 N. Find out the mass of the worker.
Two forces are acting on a 9.5 kg box on a frictionless surface. Force A has a magnitude of 44 N, Find the magnitude of the acceleration of the box
Light rays in a material with index of refrection 1.25 can undergo total internal reflection, Find this material's index of refraction when the required critical angle is 67.9°
A 0.10kg solid rubber ball is attached to the end of a 0.80 m length of light thread. The ball is swung in a vertical circle. Point p, the lowest point of the circle, is 0.20 m above the floor.
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