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A standard 100 W (120 V) lightbulb contains a 7.70cm-long tungsten filament. The high-temperature resistivity of tungsten is 9.0×10?7?m.
What is the diameter of the filament?
Find the speed of a satellite moving in a circular orbit just above the surface of Mars. Mars has a radius of 3.40 106 m and a mass of 6.42 1023 kg
A planet of total mass M and radius R has a non-uniform density such that p(r) = po (1-r/R), Determine the gravitational field g(r) at a point r ? R inside the planet
Density of Aluminium is 2.7g/cm3 or 2.7g/ml. How heavy (in grams) would be the coke can if instead of soda it would be filled in with aluminium? The volume of a soda can is 303 ml.
the flow rate of blood through a 2.10x10^-6 m radius capillary is 4.07x10^-9 cm^3/s. what is the speed of the blood flow
If the mercury in this barometer is replaced with water, to what height does the column of water rise
Two point charges -2Q and +3Q are on the x-axis, -2Q at the origin and +3Q at x = D. Find two points on the x-axis within the vicinity of the charges where the electric potential is zero
A charge +q is at the origin. A charge -2q is at x = 9.10 m on the +x axis. (a) For what finite value of x is the electric field zero? (b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V =..
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved
A river narrows at a rapids from a width of 15m to a width of only 6.0m. The depth of the river before the rapids is 2.7m ; the depth in the rapids is 0.70m. Find the speed of water flowing in the rapids
A particle leaves the origin with an initial velocity of 4.20 m/s in the x direction, and moves with constant acceleration ax = -1.80 m/s2 and ay = 2.30 m/s2. a-How far does the particle move in the x direction before turning around? b-What is the..
Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 134 km long, 39.4 km wide, and 187 m thick.
If a 60.0 kg person slides down an incline angled 25%u02DA below the horizontal and friction IS present with a coefficient of kinetic friction equal to k = 0.450. What is the person's acceleration
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