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The pilot of an airplane notes that the compass indicates a heading due west. The airplane's speed relative to the air is 120 km/h. The air is moving in a wind at 35.0 km/h toward the north. Find the velocity of the airplane relative to the ground.
The energy of the first excited state of a hydrogen atom is -0.34eV +/- 0.0004eV. What is the minimum average lifetime for this state
The displacement of an object moving under uniform acceleration is some function of time and the acceleration. Suppose we write this displacement as s=ka^mt^n, where k is the dimensional constant. Show by dimensional analysis that this expression ..
A sinusoidal transverse wave travels along a long stretched string. The amplitude of this wave is 0.0859 m, its frequency is 2.41 Hz, What is the shortest transverse distance between a maximum and a minimum of the wave
A single force acts on a 4.4 kg particle-like object in such a way that the position of the object as a function of time is given by x = 3.8t - 4.6t2 + 1.3t3
Find the wavelength of the scattered photon when the scattered electron has its maximum kinetic energy
A father racing his son has 1/4 the kinetic energy of the son, who has 1/3 the mass of the father.What are the original speeds of the father and son
A dockworker applies a constant horizontal force of 70.0N to a block of ice on a smooth horizontal floor. how far does the block move in the next 4.50s
A box of mass 5.4 kg is accelerated from rest by a force across a floor at a rate of 2.0 m/s2 for 9.0 s. Find the net work done on the box
One long wire lies along an x axis and carries a current of 42 A in the positive x direction, What is the magnitude of the resulting magnetic field at the point (0, 2.0 m, 0)
It takes 2.7×106J of heat to bring a quantity of water from 24?C to a boil. What is the mass of water
A rattlesnake can strike with the acceleration equivalent to an increase in speed from 0 to 60 mi/h in 1/2 s. If the rattlesnake's head weighs 0.33 lb, what average power does the rattlesnake generate throughout its strike.
A gardener pushes a box of tools across a driveway by applying a 22.5- N force that pushes downward at an angle of 23.1 o, How much work is done if the box moves 2.55 m in the horizontal direction
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