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While walking between gates at an airport, you notice a child running along a moving walkway. Estimating that the child runs at a constant speed of 2.2 m/s relative to the surface of the walkway, you decide to try to determine the speed of the walkway itself. You watch the child run on the entire 23-m walkway in one direction, immediately turn around, and run back to his starting point. The entire trip takes a total elapsed time of 33 s. Given this information, what is the speed of the moving walkway relative to the airport terminal?
The average distance of the planet Mercury from the sun is 0.39 times the average distance of the earth from the sun
in a young's double slit experiment two rays of monochromatic light emerge from the slits and meet at a point on a distant screen. what is the wavelength in mm of the monochromatic light
Medical technicians use small centrifuges to isolate blood cells. How far are the test tubes from the rotation axis
An automobile tire is inflated with air originally at 10.0°C and normal atmospheric pressure. What is the tire pressure in pascals
A cylinder 5 m high with a 2m diameter is filled with water at 20 degrees C at 101 kPa is placed on the ground (circle side down). It is then drained form the bottom. What is the entropy generation in this process? Note: this is a transient process, ..
A girl of mass 40 kg jumps with a horizontal velocity of 5 m s-1 onto a stationary cart with frictionless wheels. What is her velocity as the cart starts moving
The magnitude of the electrostatic force between two identical ions of mass 1.224×10-25 kg that are separated by a distance of 6.50 nm is 1.770×10-9 N. Calculate the electric field at the site of each ion
The intensity of the sound from a certain source is measured at two points along a line from the source. The points are separated by 17.2 m, the sound level is 70.00 dB at the first point and 56.13 dB at the second point.
Calculate the angular velocity of a clock's second hand. State in rad/s. and Calculate the angular velocity of a clock's minute hand
The spring is kept from pushing them apart, since they are holding each other. When they release their arms, Al moves off in one direction at a speed of 1.16m/s, while Jo moves off in the opposite direction at a speed of 0.973m/s. Assume that frictio..
When you drive your car over a bump, the springs connecting the wheels to the car compress. Your shock absorbers then damp the subsequent oscillation, keeping your car from bouncing up and down on the springs. Figure shows real data for a car driven ..
a 3,000-kg vehicle collides with a 1,000-kg stationary vehicle. What was the speed of the 3,000-kg vehicle
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