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A bullet is fired horizontally at 800 m/s and strikes a target that is 160 m from the gun. If the marksman hears the sound of the impact on the target 0.67 s after he fires the gun, what is the speed of sound?
Silver has a resistivity of 1.62×10^?8 ?m, and a density of 1.05×10^4 kg/m3. What is L? 2.At 20.0 °C, a mainly silicon resistor has a resistance of 585 ?, At what temperature will their resistances be equal
Three capacitors are connected in series. The equivalent capacitance of this combination is 2.70 ?F. Two of the individual capacitances are 6.70 ?F and 8.30 ?F. What is the third capacitance (in ?F)?
In a heat conductivity experiment, a slab of silicon of thickness 2 x 10^-3m and area of 0.40m^2 seperates condensing steam(lv=540cal/g) at 100 degree C, Find the increase of entropy in the universe during one minute of this experiment
question1the barrels of the 16-in guns bore diameter 16 in 41 cm on the world war ii battleship u.s.s. massachusetts
A 18.0 kg block is dragged over a rough, horizontal surface by a constant force of 77.6 N acting at an angle of 35? above the horizontal. The block is displaced 10.8 m, and the coefficient of kinetic friction is 0.149.
A uniform magnetic field B is perpendicular to the plane of rotation. What is the potential difference between the ends of the bar
A capacitor has a capacitance of 2.74 10-8 F. In the charging process, electrons are removed from one plate, how many electrons have been transferred
A wheel starts from rest and rotates about its axis with constant angular acceleration. What is the angular acceleration of the wheel
Oppositely charged parallel plates are separated by 5.78 mm. A potential difference of 600 V exists between the plates. find the magnitude of the electric field between the plates
A 15m length of wire consists of 6.0m of copper followed by 9.0m of aluminum, both diameter 1.4mm. A voltage difference of 70mV is placed across the composite wire, What is the total resistance (sum) of the two wires
A cube with sides of length 4 meters is placed with one corner at the origin. An electric field of E = 2xi + 3j) N/C is in the region of the cube. Find the net flux through the cube
A point charge with q1 = +1.9 C is located at x = ?3.0 m, y = 0, and a second point charge with q2 = +6.5 C is at x = +1.0 m, y = +2.0 m. (a) What is the force exerted by q1 on q2? magnitude N direction ° counterclockwise from the +x-axis (b) What..
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