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About 100 years or so ago, some critics claimed that rocket propulsion in outer space would never work "because in outer space there is no air for the rocket to push off against". Well, as we now know, rocket propulsion in outer space does work, and those critics were completely wrong! But why? Explain clearly.
At the Indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between receding and approaching cars. Evaluate how fast is it going
A system consisting of an ideal gas at the constant pressure of 120kPa gains 800J of heat a)Find the change in volume of the system if the internal energy of the gas increases by 480J b)Find the change in volume of the system if the internal energ..
If twice the force is exerted over twice the distance, how does the resulting increase in kinetic energy compare with the original increase in kinetic energy?
A piece of audio equipment is said to have a signal-to-noise ratio of 52 dB. Obtain the ratio of intensities of the signal and the background noise
A generator is connected to a resistor and a 0.032-H inductor in series. The rms voltage across the generator is 7.2 V. When the generator frequency is set to 110 Hz, the rms voltage across the inductor is 3.7 V. Determine the resistance of the resis..
A 70 turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.15 T field, At what time is the peak emf first reached
A 43 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 17 m apart but connected by a rope of negligible mass. What is the acceleration of the girl
a uniform electric field of magnitude 380 nc pointing in the positive x-direction acts on an electron which is
A bullet is fired through a board 10.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. Find the total time the bullet is in contact with the board
A galvanometer has a full-scale current of 0.11 mA and a coil resistance of 57 Ω. This instrument is used with a shunt resistor to form an ammeter that will register full scale for a current of 74 mA. Determine the resistance of the shunt resistor.
A cylindrical tank with a large diameter is filled with water to a depth D = 0.298 m. What is the rate at which water flows out
Star S and Star K have the same tangential velocity, but Star S is closer to Earth. Which has the larger proper motion
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