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Grains of fine California beach sand are approximately spheres with an average radius of 50 μm and are made of silicon dioxide, which has a density of 2.8 × 103 kg/m3. What mass of sand grains would have a total surface area (the total area of all the individual spheres) equal to the surface area of a cube 1.1 m on an edge?
A 1200 kg boat is traveling at 80 km/h when its engine is shut off. The magnitude of the frictional force fk between boat, Find the time required for the boat to slow down to 40 km/h
A long horizontal wire carries 26.0A of current due north. The Earth's field 22.0cm due west of the wire points north but downward, 47° below the horizontal, and has magnitude of 5.0×10-5T.
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of 8.00 cm. how long does it take a ripple passing the cork to reach the shore
a hollow metal sphere has 7cm and 11cm inner and outer radii respectively. the surface charge density on the inside
two charges q1 and q2 have a total charge of 16 c. when they are separated by 1.5 m the force exerted by one charge on
The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated, What is the specific heat of the metal
A block of wood, with density 780 kg/m3 has a cubic shape with wides 0.330 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. What is the mass of the lead
A pitcher throws a fastball horizontally at a speed of 140 km/h toward home plate, 18.4 m away. (a) If the batter's combined reaction and swing times total 0.350 s, how long (in seconds) can the batter watch the ball after it has left the pitcher's h..
A fisherman is fishing from a bridge and is using a "30.0-N test line." In other words, the line will sustain a maximum force of 30.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically.
If the laser light wavelength is 1062 (this corresponds to a Neodymium-YAG laser), how many wavelengths are found within the laser pulse
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, How deep is the hole
What is the maximum displacement of the bridge deck?
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