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A 5g lead bullet travelling with v=1200m/s embeds in the 1kg block of ice at (-1°C). Knowing that practically all of the kinetic energy of the bullet is converted to heat find the final temperature of the bullet + ice system. How much water was produced during the melting?
An green hoop with mass mh = 2.8 kg and radius Rh = 0.17 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.4 kg and radius Rd = 0.11 m. What is magnitude of the linear acceleration of the hoop
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor at constant speed. What is the work done by friction on the crate
A 0.35kg mass suspended from a spring moves with simple harmonic motion. At the instant mass is displaced from equilibrium by -0.105 m, what is its acceleration? (The spring constant is 11.8N/m)
A mechanic pushes a 2.80 103-kg car from rest to a speed of v, doing 4,650 J of work in the process. During this time, the car moves 26.0 m. calculate the horizontal force exerted on the car
Two polarizers are oriented at 30.0 degrees to one another. Light polarized at a 15.0 degree angle to each polarizer passes through both
A series RLC circuit has components with following values: L = 20.0 mH, C = 100 nF, R = 20.0 Ohm, and dVmax = 100 V, Calculate the average power in the resistor at resonance
A transformer is to be used to provide power for a computer disk drive that needs 7.0 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
In a television tube, electrons initially at rest are accelerated by a uniform electric field of magnitude 4.8 105 N/C during the first 5.0 cm of the tube's length, Find the speed of the electrons when they hit the screen
An interplanetary spaceship passes through the point in space where the gravitational forces from the moon and the earth on the ship exactly cancel. How far from the center of the earth is it
A passenger in a roller coaster ride experienced weightless when s/he was at the top of the loop. If the loop has radius 16.0 m, what is the linear speed at the top
An AC generator has a sinusoidal EMF with a maximum value of 25.0 V and a frequency of 60.0 Hz; what is the power output of the generator
a 7.4 cm-diameter-baseball has a mass 145 g and is spinning at 2000 rpm. Treating the baseball as a uniform solid sphere, whats its angular momentum
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