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There are two light bulbs in a circuit, powered by one battery. One light bulb is a 100 watt light bulb and the other a 200 watt light bulb. How much power must the battery be supplying for the lights to be running at full power?
A golf ball of mass 0.045 kg is hit off the tee at a speed of45 m/s. estimate the impulse imparted to the golf ball
The flywheel of an engine has a moment of inertia 2.2 {rm kg} cdot {rm m} ^{2} about its rotation axis. What is its final kinetic energy.
consider the earth and a cloud layer 825 m above the earth to be the plates of a parallel-plate capacitor. if the cloud
how to calculate the reactions on a beam with i angular point load at 10kn at 60 degrees and a url of 7knm. beam span
A loudspeaker at a rock concert generates 10-2 W/m2 at 22.0 m at a frequency of 1.0 kHz. Assume that the speaker spreads its energy uniformly in three dimensions. What is the total acoustic power output of the speaker
A ball of mass m makes a head-on elastic collision with asecond ball (at rest) and rebounds with a speed equal toone-fifth its original speed. What is the mass of the second ball
john is listening to a horn. he knows the frequency of the horn is 516.402 hz when both he and the horn are at rest. if
An object has a total energy of 5.0x10^15 J and a kinetic energy of 2.0x 10^15 J. What is the magnitude of the objects relativistic momentum
About 0.1eV is required to break a hydrogen bond in a protein molecule, what is the minimum frequecy that the radiation can have to accomplish that?
Water flows though a 20mm diameter pipe at 3L/min and static pressure of 100mmHG. What is the wall stress of the pipe. The pipe is 1.5mm thick
The Doppler effect using ultrasonic waves of frequency 2.27×10^6hz is used to monitor the heartbeat of a fetus. calculate the maximum velocity of the surface of the beating heart
Estimate the electric field needed to pull an electron out of an atom in a time comparable to that for the electron to go around the nucleus.
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