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The lower block in is pulled on by a rope with a tension force of F = 31 N.The coefficient of kinetic friction between the lower block and the surface is 0.40. The coefficient of kinetic friction between the lower block and the upper block is also 0.40. What is the acceleration of the 2.0 kg block
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.6 m above the ground, Use the work-energy theorem to find its speed just as it left the ground
A light bulb is connected to a 120 V wall socket. The current in the bulb depends on the time t according to the relation I = (1.414 A) sin[ (125.6 Hz) t ]. What is the average power delivered to the light bulb
a runner starts from rest and in 3 seconds reaches a speed of 9 ms. if we assume that the speed changed at a constant
Heat is another word for thermal energy. Dissimilar materials at the same temperature can contain different amounts of heat.
Find the capacitance of a parallel plate capacitor that has two square plates both having a side length of 6 cm, where these plates are seperated by 15 mm
The artery in the figure has an inside diameter of 2.75 mm and passes through region where the magnetic field is 0.65 T. what is the speed of the blood
Consider a 61.5-cm long lawn mower blade rotating about its center at 3230 rpm. Calculate the linear speed of the tip of the blade
What is the kinetic energy of these protons in eV afterthey hit the top speed 1,500,000 m/s
On an essentially frictionless, horizontal ice rink, a skater moving at 6.0m/s encounters a rough patch, Use the work-energy theorem to find the length of this rough patch.
a 78 g ice cube at -18degc is placed in a lake whose temperature is 12degc. calculate the change in entropy of the
A flight attendant pulls her 74 Nflight bag a distance of 318 m along alevel airport floor at a constant velocity. Find the work she does on the flight bag
Two infinite lines of charge lie in the x-y-plane, parallel to the y-axis. Line 1 has linear charge density ?1 = 4.2 ?C/m and passes through x = -2.5 cm. compute the magnitude and direction of the electric field
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