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The engine of a car works at 3000 rpm (revolutions per minute). Calculate frequency and period of revolution for the engine in SI units.
A 120 m long copper wire (resistivity 1.68e-8 Ohm*m) has resistance 6 Ohm. What is the diameter of the wire
A ski jumper has 1.2 ´ 10 J of potential energy at the top of the ski jump. The friction on the jump slope is small, but not negligible. What can you end about the ski jumper's kinetic energy at the bottom of the jump.
A 3.00-kg block starts from rest at the top of a 34.5° incline and slides 2.00 m down the incline in 1.50 s. Find the frictional force acting on the block
during 9.75 seconds a motorcyclist changes his velocity from v1x -30.3 ms and v1y 13.1 ms to v2x -26.1 ms and v2y
The total force above is all in the up/down direction, and makes the bar press against the top bar until they compress enough to get an equal and opposite force pushing the bar back. What is the net force on the body of the bar from the compressio..
A metal cylinder is measured to have a length of 5.0 cm and a diameter of 1.26 cm. Compute the volume of the cylinder in cm3. Use pi =3.14159. Write your final answer with the correct number of significant figures.
A sports car traveling along a straight line increases its speed from 20.4 mi/h to 60.4 mi/h. What is the ratio of the final to the initial kinetic energy
A dipole is located at the origin, and is composed of charged particles with charge +e and -e, separated by a distance 9 10-10 m along the y axis
A spark can jump among two no touching conductors if the potential difference among them is sufficiently large. A potential dissimilarity of approximately 940 V is required to produce a spark in an air gap of 1.0x10-4 m.
A refrigerator has a coefficient of performace of 2.10. In each cycle it absorbs 20000J of heat from th ecold reservoir. how much heat is discarded to the high-temperature reservoir
Describe the two forms of variation in production systems and how they affect quality.
Two capacitors, one 12.0 µf and the other of unknown capacitance, are connected in parallel across a battery of EMF 9.0 V. What is the unknown capacitance
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