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Two cyclists approach and intersection, one from the west and the other form the north, the cyclists from the west has a mass if kg and the one from the north has a mass of 140 kg and is travelling
The component of the external magnetic field along the central axis of a 50-turn coil of radius 4.8 cm decreases from 1.8 T to 0 T in 4.4 s. (a) If the resistance of the coil is 2.8 O , what is the
A helium-filled balloon of the type used in long-distance flying contains (1.3 107 L) of helium. Let us say you fill the balloon with helium on the ground where the pressure is 709 mm Hg and the tem
A charge of -6.4 μC is at the corner of a cube with 0.45 m sides. What is the total flux through the entire surface of the cube?
The empirical formula of a group of compounds is CHCl. Lindane, a powerful insecticide, is a member of this group. The molar mass of lindane is 290.8 g/mol. How many atoms of carbon does a molecule
(a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.) (b)
What is the magnitude of the acceleration of a proton placed at that point in space?
A cube of solid benzene (C6H6) at its melting point and weighing 8.37 g is placed in 19.3 g of water at 38.8 °C. Given that the heat of fusion of benzene is 9.92 kJ/mol, to what temperature will
The athlete is able to rotate the ball at the rate of 8.16 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.900 m, he is able to rotate the ball only 6.35 rev/s.(a)
An unknown solid salt is dissolved in water to form a solution. Describe one chemical and one physical way that the salt could be separated from the water.
A dragonfly flies from point A to point B along the path shown in the figure in 2.10s y1 = 1.0, x1 = 2 and y2 = 6, x2 = 10. A) What are the magnitude of its position vector at ?
A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal range R. (a) At what angle θ is the rock thrown?
When another 1.00g sample of ascorbic acid is diddolved in 10.0g of water the freezing point of the solution is -1.06C. At this temperature the dissociation of ascorbiacid is negligible.
A 1500 kg space ship is at a height of 4.30 x 10^7 m above the surface of the Earth traveling at 3600 m/s. a.) Could this space ship be in a circular orbit? Explain.
At the end of an experiment with a radioactive element, 1.90 ng of the element remained. If 3 half lives passed, how many ng of the element were originally present?
Three resistors with values 1.0 , 2.1 , and 4.2 are connected in parallel in a circuit with a 7.2 battery. What is the total equivalent resistance?
A certain car traveling 32.0 mph skids to a stop in 35 meters from the point where the brakes were applied. In approximately what distance would the car stop had it been going 89.6 mph?
Here are the enthalpy changes when one mole of HCl gas is added to various moles of water: -16.608 Kcal for 10 mol, -17.272 Kcal for 25 mol, -17.453 Kcal for 40 mol, -17.735 Kcal for 200 mol, -17.96
A 1Kg non-stretched balloon fabric on the ground (P0= 1 bar) is attched to a 2Kg payload. One Kg of helium is places in the balloon. How many pounds of restraint are needed to keep the assembly teth
A baby's mouth is 30 cm from her father's ear and 1.50 m from her mother's ear. What is the difference between the sound intensity levels heard by the father and by the mother?
Why must the electrical field lines leave the surface of a conductor perpendicularly? Explain your answers in terms of electrical potential on and near the conductor plate surface.
A piece of wood is 0.6 m long, 0.250 m wide and 0.080 m thick. The density of wood is 600 kg/m^3. What volume of lead must be fastened underneath it to sink the wood so that its top is just even wit
Following each throw, the ball has a speed of V (m/s )relative to the thrower. After each has made one throw and one catch, (a) How fast are the astronauts moving?
An irregular piece of metal that has a mass of 14.28 grams is placed in a graduated cylinder that contains 20.0 mL of water. The water level rises to 21.8 mL. What is the density of the solid?
A 1500 kg car moving at 5.4 m/s is initially traveling north in the positive y direction. After completing a 90° right-hand turn to the positive x direction in 4.4 s, the inattentive operator d