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Car 1 is traveling at 85km/h approaching car 2 traveling at 60km/h. At 10m behind car 2, car 1 decelerates at 4.2m/s^2. What will be the distance between the cars at their closest approach?
In the first 3.1 seconds of a bobsled run, the 45 kg sled is pushed until it reaches a speed of 1.14 m/s. What constant force is exerted by the bobsled team
At a rock concert, the sound intensity 1.0 {\rm m} in front of the bank of loudspeakers is 0.10 W/m^2. How much energy is transferred to each eardrum in one second
A spherical mirror is polished on both sides. When used as a convex mirror, the magnification is +1/5. What is the magnification when used as a concave mirror, the object remaining the same distance from the mirror? Give your answer to three signific..
a magnetic field is oriented at an angle 60 degrees to the normal of a rectangular area. if the magnetic field has a
A 91.0-kg bungee jumper steps off a bridge with a light bungee cord tied to her and to the bridge. The unstretched length of the cord is 15.0 m. What time interval is required for the cord to stretch by 26.0 m
A heater coil connected to a 240-Vrms ac line has a resistance of 45. what is the average power used? What is the maximum value of the instantaneous power?
a 0.465 kg wood block is firmly attached to a very light horizontal spring k 165 nm . it is noted that the
A 7.7 uf capacitor and a 1250 ohm resistor are connected in series to a generator operating at 50 Hz and producing an rms voltage of 208 V
One particle has a mass of 4.59 x 10-3 kg and a charge of +7.03 ?C. A second particle has a mass of 8.88 x 10-3 kg and the same charge. Find the initial separation between the particles
A piece of wood 350 mm × 350 mm and 15 mm thick conducts heat through its thickness under steady state conditions. Determine the coefficient of thermal conductivity for this wood
A parallel combination of a 1.27 uF capacitor and a 2.67 uF one is connected in series to a 4.85 uF capacitor. FInd the charge of each capacitor
A fire helicopter carries a 649 kg bucket of water at the end of a 18.7 m long cable. Flying back from a fire at a constant speed of 44.2 m/s, Determine the force of air resistance on the bucket
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