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A narrow slit is illuminated with light of wavelength 590 nm. A diffraction pattern is produced on a screen positioned 1.0 m away from the slit. The first two dark fringes on either side of the central bright fringe are separated on the screen by a distance of 6.5 mm. What is the width of the slit?
Where are the majority of older, metal-poor stars found in the Milky Way galaxy? The center of our Milky Way Galaxy can be observed most easilyat which of the following electromagnetic wavelengths? A spiral density wave refers to a region of enhanced..
Two Styrofoam balls with the same mass m = 9.5 10-8 kg and the same positive charge Q are suspended from the same point by insulating threads of length L = 0.98 m (the figure below). The separation of the balls is d = 0.026 m. What is the charge Q?
In a simple model of the hydrogen atom an electron orbits a proton at 2.18 x 10^6 m/s in a circle radius 5.29 x 10^ -11 m. Find the magnitude of the electron's angular momentum
A scout troop is practicing its orienteering skills with a map and compass. First they walk due east for 1.2 km. Next,they walk 35 degrees west of north for 3.5 km. How far and inwhat direction must they walk to go directly back to their startingp..
According to the Bohr model, a hydrogen atom in its lowest energy state has a nucleus consisting of a single proton, What is the magnitude of the "current" flowing around the nucleus
Two objects are thrown from the tope of a 10m tall builing. The first objects is thrown upwards with a velocity of 15 m/s, Determing the speed of both objects just before they hit the ground
A double slit is opposite the center of a 1.7-m wide screen 1.9 m from the slits. How many fringes are visible on the screen if the slit is illuminated by 648-nm light
A block of mass 1.90 kg is pushed 4.60 m along a frictionless horizontal table by a constant 16.0 N force directed 27.0° below the horizontal.
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40-kg child sits on the other end. How long is the beam
question a 2.0 kg projectile if fired with initial velocity components vox 30 ms and voy 40 ms from a point on the
suppose there are 500 billion stars in the galaxy. How does your answer change if there are only 110 civilizations instead of 1.2×10^4.
A string under a tension of 47.00N is used to whirl a rock in a horizontal circle of radius 2.60 m at a speed of 21.0 m/s. The string is pulled in and the speed of the rock increases.
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