Determine the final temperature of the room
A 3 m x 3 m x 2.4 m room losses heat through the walls at a rate of 520 W. Determine the final temperature of the room after 2 hrs with the electric baseboard heater drawing 120 V and 4.5 A. The initial temperature of the room is 15 °C
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Fuel economy estimates for an automobile built one year predicted a mean of 27.2 mpg and a SD f 5.8 mpg. What is the probability that a randomly selected automobile from thsi year gets more than 19.66 mpg?
You are holding a book against a vertical wall by pushing upwards with your hand. The angle between your force and the vertical is a (< 90?). The mass of the book is m and the coeficient of static friction is µ.
What is the mass of the aluminum foil? The density of aluminum is 2.71 g/cm^3. The atomic radius of aluminum is .143 nm.
A long cylinder carries a charge density which is proportional to the distance rom the axis: p = kr, for some constant K. Find the electric field inside and outside of the cylinder?
The data below are the temperatures on randomly chosen days during a summer class and the number of absences on those days. Find the standard error of estimate, se, given that y = 0.449x - 30.27.
A Carnot Engine operates between two reservoirs maintained at 400 degrees celcius(673.15K) and T2, respectively. The heat transfer from the high temperature reservoir is 25kW.
A 190 kg object is moving 15 m/s. If a net work of 12500 J is done on the object to increase its speed, then use the Work-Energy Theorem to find the final speed of the object.
A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated, 180 people are vaccinated with a placebo, and 100 people are not vaccinated. The number in each group who later caught the flu was recorded. The results
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