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A "moving sidewalk" in an airport terminal building moves at a speed of V0 and is of length L. A woman steps on at one end and walks at speed V relative to the moving sidewalk.
1. How much time does she need to walk from one end to the other if she walks in the same direction the sidewalk is moving?
2. How much time does she need to walk from one end to the other if she walks opposite to the direction the sidewalk is moving?
A day on a distant planet observed orbiting a nearby star is 52.1 hours. Also, a year on the planet lasts 38.7 Earth days. Calculate the average angular speed of the planet
In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 2.7 kg book is pushed from rest through a distance of 0.70 m by the horizontal 32 N force from the broom and..
Suppose one bullet with M=5.12g moving to the right with a speed of 250 m/s directed at 21.3 degrees above the horizontal collides, What is the direction of their common velocity immediately after the collision? Measure this angle in degrees from t..
What is x and y coordinates of the shell
A football is kicked at ground level with a speed of 15.0 m/sat an angle of 40.0 to the playing field (horizontal). How much later does it hit the ground
A laser beam is traveling through an unknown substance. When it encounters a boundary with air, the angle of reflection is 24.9° and the angle of refraction is 43.0°. What is the index of refraction of the substance
selzer estimates the total cost of servicing the warranties will be $120,000 for 2 years. Estimate revenues earned on basis of costs incurred an estimated costs.
Three moles of an ideal monatomic gas are at a temperature of 393 K. Then 2568 J of heat is added to the gas, and 631 J of work is done on it. What is the final temperature of the gas
The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime of for this state
A 1500 kg car is driven onto a pair of ramps so that it fronts wheels have been raised 0.3 m above the rear wheels. How much of the car's weight is supported by the rear wheels
a blacksmith uses the heat energy from an oven to heat steel and other metals. increasing the temperature makes it
The first star on the handle of the Big Dipper and the star that forms the far bottom edge of the bowl(Merak).
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