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A beam of light of wavelength 630 nm is incident on a slit that is 0.400 mm wide. If the distance among the slit and the screen is 1.80 m, what is the width on the screen of the central bright fringe?
One rod is made from quartz and another from lead. The rods are heated and experience the same change in temperature. calculate the initial length of the quartz rod
The Calorie (or kcal) is another energy unit and is commonly used to measure food energy (as well as heat). How many Calories would you burn walking up a flight of stairs for an hour
How many square meters of PV would it take to provide 1 kW for a world population of 6 billion? If these cells were crystalline silicon of 200 microns thick(200*10^-6), what is the minimum mass of silicon material needed for this venture? (Density of..
a vertical spring ignore its mass is attached to a table and is compressed down 20 cm. the spring constant is 900 nm.if
A white billiard ball with mass mw = 1.43 kg is moving directly to the right with a speed of v = 3.42 m/s and collides elastically with a black billiard ball with the same mass mb = 1.43 kg that is initially at rest.
the headlights of on a small car are separated by 115 cm. at what maximum distance could you resolve them if the
One point-like charge of +20 nC sits at the center of a thick spherical shell of inner radius 4 cm and the outer radius 6cm. The shell is made of copper and has a net charge of -10 nC.
What are the x-component and y-component of the velocity.
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 413 N and F2 = 357 N. What is the resultant of these two forces
A flight attendant pulls her 61N flight bag a distance of 279m along a level airport floor at a constant velocity. The force she exerts is 41N at the angle of 50° above the horizontal.
A 75 kg person escapes from a burning building by jumping from a window 25-m above a catching net. Assuming that air resistance exerts a 95-N force on the person all through the fall, determine out the person's velocity just before hitting the net..
The density of aluminium is 2700 kg/m3. What is the velocity of a wave that propagates along a cylindrical aluminium wire that has a radius of 2.30 mm and is under a tension of 58.0 N?
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