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Problem: Sampling stuffed envelopes. A large retailer prepares its customers' monthly credit card bills using an automatic machine that folds the bills, stuffs them into envelopes, and seals the envelopes for mailing.
Required:
1. Are the envelopes completely sealed? Inspectors choose 40 envelopes from the 1000 stuffed each hour for visual inspection.
2. What is the population for this sample survey? What is the sample?
Consider a circuit containing a resistor with R =2600 Ω and a capacitor withC = 4.9 µF. At what frequency does the reactance of the capacitor equal the resistanceof the resistor?
A net force of 19 newtons is applied horizontally to a 10. kilogram block resting on a table. What is the magnitude of the acceleration of the block
A 0.21-kg coffee mug is made from a material that has a specific heat capacity of 900 J/(kg · C°) and contains 0.36 kg of water. determine the minimum power rating of this heater
A boat crosses a river of width w=100 meter in which the current has a uniform speed of 1.35 m/s. Obtain how far downstream from the initial position is the boat when it reaches the opposite shore
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
A cannon has a mass 1000 kg. Its muzzle speed 300 m/s. What will be the speeds of the cannon and ball after firing
q1. an open-pit coal mine consumes 96 hectares of land down to the depth of 26 m each year. what volume of earth in
1040 carbon steel is a medium carbon steel. determine the applied stress at failure for a crack the length of 5 mm
A boat capable of making 6.0 km/h in still water is utilized to cross a river flowing at speed of 4.0 km/h. The boat is directed (from the perpendicular to the shore) in such a way that its resulting motion is straight across the river.
A woman holds a tube of lipstick 5.1 cm from a spherical mirror and notices that the image of the tube is inverted, Calculate the focal length of the mirror.
The length of a simple pendulum is 0.77 m and the mass of the particle (the "bob") at the end of the cable is 0.25 kg. What is the angular frequency of the motion
You want to take a full-length photo of your friend who is 1.80{\rm m} tall, using a 35.0{\rm mm} camera having a 50.0{\rm mm} lens. How far is the lens from the film
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