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1. Histogram or stemplot? Explain why we prefer a histogram to a stemplot for describing the returns on 1528 common stocks.
2. Automobile fuel economy. Government regulations require automakers to give the city and highway gas mileages for each model of car. Table 11.2 gives the highway mileages (miles per gallon) for 31 model year 2008 sedans. Make a stemplot of the highway gas mileages of these cars. What can you say about the overall shape of the distribution? Where is the center (the value such that half the cars have better gas mileage and half have worse gas mileage)? Three of these cars are subject to the "gas guzzler tax" because of their low gas mileage. Which three?
A solar cell provides an emf of 0.20 V. If the cell supplies a constant current of 21.5 mA for 8.0 h, how much electrical energy does it supply
The work function of zinc is 3.6 eV. What is the maximum energy of the photoelectrons ejected by UV light of wavelength 3000 angstroms?
In compressing the spring in a toy dart gun, 0.4 J of work is done. What is the dart's kinetic energy as it leaves the gun
A gas of hydrogen atoms is in the n = 2, l= 1 state. Find the spacing between the three degenerative levels of Ml
A size-5 soccer ball of diameter 22.6 and mass 426 rolls up a hill without slipping, reaching a maximum height of 3.50 above the base of the hill. At what rate was it rotating at the base of the hill
A battery has an emf and an internal resistance . When the battery is connected to a 25 resistor, the current through the battery is 0.65 . When the battery is connected to 60 resistor, the current is 0.45 .
A delivery man travels 34.0 m north, 23.0 m east, 12.0 m south, then takes an elevator 32.0 m up into a building. What is the magnitude of his displacement
The first bright fringe of a diffraction grating of 600 ruling/mm is found at angle of 21 degrees.Find the wavelength of light of the source.
Two identical piano wires have a fundamental frequency of 491 Hz when kept under the same tension. when both wires oscillate simultaneously
An object attached to a horizontal spring is oscillating back and forth along a frictionless surface. Determine how much time elapses between an instant when the object's speed is at a maximum and the next instant when its acceleration is at a maxi..
An airoplane takeoff speed is 320km/h. if its average acceleration is 2.9m/s^2, how long is it on runway after starting its takeoff roll.
A 10,000 kg empty railroad car moving at 3 m/s collides with a loaded railroad car weighing 196,000 N and couples with it
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