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Two trains are moving in opposite directions on parallel tracks and are approaching a station. Horns on both trains are producing sound of frequency of 500Hz. One train is approaching at 32m/sec. What is the speed of the other train if an observer at the station hears a beat frequency of 4.4Hz.
An air traffic controller has two aircraft on radar. The first is at an altitude of 0.5 km, a horizontal distance of 3 km measured along the ground to the point directly underneath the plane, and a bearing of 115° west of north.
A gas expands from I to F. The energy added to the gas by heat is 423 J when the gas goes from I to F along the diagonal path.
A small metal ball with a mass of 6.19 g and a charge of 6.15 mC is located at a distance of 0.67 m above the ground in an electric field of 11.5 N/C directed to the east
The two hot-air balloons in the drawing are 48.2m and 61.0 m above the ground, What is the horizontal distance x between the two balloons
what is the dimension of gravitational force and what is the dimension of acceleration
A motor develops 0.75 kW of power at 2000 revs per 10 min. What torque is applied to the motor shaft
Light of wavelength 595.00 nm is incident normally on a diffraction grating, How many slits/mm are marked on the grating
The air around a spinning 142g baseball (below) of radius 3.55cm experiences a faster speed on the left than the right side, determine the pressure difference between the right and left sides of the ball
A metal rod with a diameter of 2.30 cm and length of 1.10 m has one end immersed in ice at 32oF and the other end in water at 212oF. what is the thermal conductivity of this metal
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 9 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by the vacuum cleaner.
By how much does the carrier lengthen. what is the magnitude of his average velocity for the 200.
A 3.5 k and a 1.5 k resistor are connected in parallel and this combination is connected in series with a 1.8 k resistor. If each resistor is rated at 1/2 W, what is the highest voltage that can be applied across the whole network.
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