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A piece of metal is released under water. The volume of the metal is 38.1 cm3 and its specific gravity is 5.1. Evaluate what is its initial acceleration?
Two balls with a net charge of - 4.0 C and + 10.0 C are separated by 2 cm. A) What is the electrostatic force on the positive charge? B) What is the electrostatic force on the negative charge?
At this depth, what force must the frame around a circularsubmarine porthole having a diameter of 31.0 cm exert to counterbalance the force exertedby the water?
Two cars of the same mass collide at an intersection. Just before the collision one car is traveling east at 40.0 km/h and the other car is traveling south at 70.0 km/h. what is the speed of the cars immediately after the collision
A light board, 10 m long, is supported by two sawhorses, one at one edge of the board and a second at the midpoint. What is the force exerted by the sawhorse at the end of the board
A driver travels northbound on a highway at a speed of 30.0 m/s. A police car, travelling southbound at a speed of 38.0 m/s approaches with its siren producing sound at a frequency of 2500Hz.
a box rests on top of a flat bed truck. the box has a mass of m 19.0 kg. the coefficient of static friction between
You have tuning forks for frequencies of 294 hz and 300hz. (A) What beat frequency is heard when you play both forks at the same time? (B) If you have an (unturned) string which makes for a beat frequency of 8 hz against the 294hz fork and 2hz agains..
A 423 Hz sound wave travels through a substance. What is the speed of sound in the substance
A hamburger chain advertises that it has sold more than 50 billion hamburgers. Estimate how many pounds of hamburger meat should have been used by the restaurant chain and how many head of cattle were needed to furnish the meat.
Two cylindrical glass beads each of mass m = 32 mg are set on their flat ends on a horizontal insulating surface separated by a distance d = 3 cm. The coefficient of static friction between the beads and the surface is μs = 0.3.
A revolutionary war cannon, with a mass of 1950 kg, fires a 24.4 kg ball horizontally.The cannon ball has a speed of 134 m/s after it has left the barrel. The cannon carriage is on a flat platform and is free to rollhorizontally. What is the speed..
An electron that has an energy of approximately 62 eV moves between rigid walls 1.4 nm apart. Find the quantum number n for the energy state that the electron occupies.
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