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The order in which vectors are added does not matter. Mathematicians say that vector addition is commutative. Which ordinary arithmetic operations are commutative? Which are not?
A 1.6 kg ball is at rest on the floor in a 2.4 m ? 2.4 m ? 2.4 m room of air at STP. Air is 80% nitrogen (N2) and 20% oxygen (O2) by volume. What is the thermal energy of the air in the room
A square with sides of length L has a point charge at each of its four corners. Two corners that are diagonally opposite have charges equal to +2.11 µC; the other two diagonal corners have charges Q. Find the magnitude and sign of the charges Q such ..
A stone is thrown downward from the top of a house. It reaches a point 35.60 meter below the top in 2 s. Neglecting air resistances. Find how long does it take to reach a point 110.4 meter below the top
A 200 g calorimeter contain 500 g of water at 21 degree Celsius. A 100g of ice at -20 degree Celsius is placed into the calorimeter. find the specific heat of the material of the calorimeter
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2?J · s. What is the minimum uncertainty in the duck's speed
Earth's radius is 6.37 106 m. Illustrate by what percent does the Moon's gravitational pull on you increase?
A planet of radius R is made up of three segments; a core of radius R/3 and density r/3, a middle shell from radius R/3 to 2R/3 and density r/2, and an outer shell from radius 2R/3 to R and density 3 r. What is the average density of the planet as a ..
A portion of a soap bubble appears yellow (λ = 588.0 nm in vacuum) when viewed at normal incidence in white light. Decide the two smallest, non-zero thicknesses for the soap film if its index of refraction is 1.40.
y of light in air enters a glasss surface. The angle ofrefraction in the glass is measured to be 45 degrees. what is the angle of incidence
A pair of slits, separated by 0.180 mm, is illuminated by light having awavelength of λ = 613 nm. An interference pattern is observedon a screen 154 cm from the slits.
A cylindrical section of a tree trunk 50 cm in diameter and 75 cm long is seen rolling down a road below a sawmill at a speed of 12 m/s. at least how far up the road is the sawmill
A laser beam is incident at an angle of 43.0° to the vertical onto a solution of corn syrup in water. If the beam is refracted to 25.44° to the vertical, what is the index of refraction of the syrup solution?
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