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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?
Two point charges, Q = +5.17 microC and q = -2.83 microC, are separated by r = 5.85 m. What is the electric potential energy?
compute the force and the total work required in each case. Find the tension in each of the cables.
A five-slit system with 7.2 micrometers slit spacing is illuminated with 655nm light. Find the angular positions of the third and sixth minima
A proton, an electron, and an alpha particle (of charge +2e) form an equilateral triangle of side length 2.19×10-10 m. What is the electric potential energy of the three-particle system
The atomic planes in a crysral are spaced d = 0.50 nm apart. These planes are used in a diffraction experiment with X-rays with ? = 0.05 nm. What are the diffraction angles for the first three bright fringes
1 the scientific method is used by scientists to understand the natural laws that the universe obeys. scientists are
When the starter motor on a car is engaged, there is a 330A current in the wires between the battery and the motor. Suppose the wires are made of copper and have a total length of 1.5m .
In the process of delivering maila postal worker walks 161 meter due east from his truck.he then turns around and walked 194 meter from his truck
A concrete highway is built of slabs 8.0 m long (20°C). How wide should expansion cracks between the slabs be (at 20°C) to prevent buckling if the range of temperature is -35°C to +45°C.
A rock of mass 43.00 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 252N. What is the magnitude of the acceleration of the rock.
What about the scheme itself: is it a good idea? Should you buy stock in this company?
q1. a 0.070 kg arrow hits a target at 21.10 ms and penetrates 4.90 cm before stopping. what average force did the
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