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An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 445 Hz when the train is approaching him and 418 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find?
A super tanker with the mass of 3.36 × 109 kg is moving with a constant velocity. Its engines generate a forward thrust of 4.11 × 105 N. Determine (a) magnitude of the resistive force exerted on the tanker by the water and (b) magnitude of the upward..
Two charged dust particles exert a force of 4.20 x 10^-2 N on each other. What would be the force if they are moved so they are only one-eight as far apart.
Describes possible scenarios among following
Suppose the mica is 1.5 thick (and therefore fills the space between the plates).The charges on the plates are equal and opposite and of magnitude 380.
Two blocks are placed in contact on a horizontal frictionless surface. The smaller box has less mass than the larger box. A force F is applied to the small box as shown so that the boxes accelerate to the right.
As part of a safety investigation, two 1200- {rm kg} cars traveling at 24- {rm m/s} are crashed into different barriers.
Three particles, each with a mass of 0.25 kg, are located at (- 4.0 m, 0), (2.0 m, 0), and (0, 3.0 m) and are acted on by forces, and respectively.
The length of the mercury column is 4.0cm in pure melting ice and 28.0 cm in the steam. Compute the temperature for a length of 22.0.
In a die-casting operation 0.1 kg charges of molten zinc alloy at 410 degrees C are injected at a rate of 120 charges per hour. Calculate the average die temperature after a die-casting operation
Two carts with masses of 4.80 kg and 2.78 kg move toward each other on a frictionless track with speeds of 4.94m/s and 3.17m/s respectively. The carts stick together after colliding head-on. Find out the final speed.
Which color has the highest index of refraction
A 6.5×10-25-kg particle is vibrating with simple harmonic motion with a period of 5.0×10-6 s and a maximum speed of 6.00×102 m/s. Find the Maximum displacement of the particle.
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