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Determine how much work must be done to stop a 900 kilogram vehicle traveling at 120 kilometer per hour?
A simple pendulum is swinging back and forth during a small angle, its motion repeating every 1.15 s. How much longer must the pendulum be made in order to increase its period by 0.20 s?
a 4-cylinder gasoline engine has an efficiency of 28 and delivers 290j of work per cycle per cylinder. when the engine
An AC voltage with an amplitude of 116 V is applied to a series combination of a 151 ?F capacitor, a 129 mH inductor, and a 23.4 ? resistor. Calculate the power factor at this frequency
A block of mass 12.0 kg slides from rest down a frictionless 33.0° incline and is stopped by a strong spring with k = 2.00 104 N/m. how far has the spring been compressed
A simple generator has a 620-loop square coil 21cm on a side. How fast must it turn in the 0.690 T field to produce a 140 V peak output.
The temperature of a gold bar rises by 10.0°C when it absorbs 0.677 kJ of energy by heat. The mass of the bar is 525 g. Determine the specific heat of gold from these data
Three resistors, 19 ?, 60 ?, and 100 ?, are connected in series, and a 0.45-A current passes through them. find the potential difference across this equivalent resistance
A student, late for class, ran up some stairs between landings. The landings are 10.5 meter apart. Find the average power that the student was generating during the run
A 671-kg cannon fires a 18.5-kg projectile with a speed of 273 m/s with respect to the muzzle. what is the speed of the projectile with respect to the ground
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket during its ascent
a person scuffing her feet on a wool rug on a dry day accumulates anet charge of -46.6 microcoulombs. How many excess electrons does this person get
Helium gas is confined in a volume of 3 m3 and is at pressure of 2.1 atmospheres. What is the thermal energy of this gas
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