A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1416 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1. When 180 V is applied across the ends of the hot wire, a current of 1.0 A is produced. How long is the wire? Neglect any effects due to thermal expansion of the wire.

What is the marginal product of labor function : Consider the production function Q= 20K1/2L1/2 The firm operates in the short run with 16 units of capital.Using the marginal product (MP) function derived in part c, the marginal product is _____ when 160 units are produced. |

Is the political strategist belief warranted : A political strategists believes that less than 55% of voters in a certain state support a particular issue. He then commission s a poll of 500 voters and 54% of them support this issue. If a = .05, is the political strategist's belief warranted |

Determine if the 2 suppliers have equal standard deviations : A random sample of rivets from 2 suppliers were compared to see what the mean diameter was from each and a test to determine whether the population means were the same for the 2 suppliers. Now a comparison of the variation in diameter is needed. |

Explain what is the molarity and molality of the h2so4 : A sulfuric acid solution is 54.0% H2SO4 by mass and has a density of 1.59 g/mL at 20 C. What is the molarity and molality of the H2SO4 solutions |

Determine the leghth of wire : A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1416 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1, How long is the wire |

Find the average of the three trials : Find the average of the three trials, so the correct number of significant figures, and decide if these measurements gave an accurate result. |

How to determine the sample size : How to determine the sample size for comparing mulltiple parameters like Height , weight, Blood pressure ,Blood parameters like blood glucose, total cholesterol, etc in two different populations? |

What should be the transfer price of the pocket calculators : The plant has a capacity output of 200,000 calculators per year, and the plant's manager regards 75 percent of capacity as the normal or standard output. The projected total variable costs for the normal or standard level of output |

Calculate the test statistics : Calculate the test statistics |

## What is the final temperature at thermal equilibriumA 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C? |

## Explain what is the concentration of the cd in the soilWhat is the concentration of the Cd in the soil if the city of Des Moines adds 3 tons of compost/ acre-6 inches given the compost contains 50 ppm Cd |

## Find the tension in string due to the weight of chargeA negative charge (-q) with a mass of 0.29 kg is dangling vertically on a string. Directly below this charge, is a charge with same amount of charge, but with the opposite sign (+q). When it is located 22.74 cm below the charge on the string, the .. |

## What is the speed of the electronWhat least horsepower must a motor have to be able to drag a 320 box along a level floor at a speed of 1.10 if the coefficient of friction is 0.50. |

## Suppose that it is a thin lensAn airplane is flying with a velocity of 81.6 m/s at an angle of 18.0 above the horizontal. When the plane is the distance 123 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from t.. |

## What is the total magnification for the systemDetermine the position q1 of the image formed by the first converging lens. |

## What is the average velocity over the tripA horse is capable of moving at four different speeds: walk (1.9 m/s), trot (5.0 m/s), canter (7.0 m/s), and gallop (12 m/s). An is learning how to ride a horse, what was her average velocity over the trip |

## The work done by an object to lift another objectAn object is lifted vertically 2m and held there. If the object weighs 30N, how much work was done in lifting it. Describe it briefly. |

## What is an acceleration of his headYou and a friend each drive 67 km. You travel at 88.1 km/h, your friend at 952.6 km/h. How long would your friend wait for you at the end of the trip. |

## What is the mass of each sphereThe wind exerts a force of 325N north on a sailboat, while the water exerts a force of 425 N west on the sailboat. Find out the magnitude and direction of the net force on sailboat. |

## What was the speed at which the ball leftTwo ants race across a table 73cm. long. One travels at 4.18cm/s and the other at 3cm/s. When the first one crosses finish line, how far behind is the second one. |

## The centripetal and tangential accelerations are equalThe acceleration of gravity is 10 m/s2. What is the acceleration of a 39 kg pail of cement that is pulled upward (not sideways) with a force of 421 N? Answer in units of m/s2. |

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