What is the mass of the iron block
A block of iron absorbs 5,400 joules of heat. If the temperature increases from 22 C to 32 C, what is the mass of the block? The specific heat of iron is 450 J/kg degrees celsius.
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A real battery has emf ε= 50.0 V. When it is connected to a 20.0-Ω resistor, the current is 2.45 A. What are the internal resistance of the battery and the potential differnce between its terminals?
What mass (ingrams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to vaporize 1 mole ofwater.)
A researcher expects the population proportion of Cubs fans in Chicago to be 80%. The researcher wishes to have an error of less than 5% and to be 95% confident of an estimate to be made from a mail survey. What sample size is required? (Please ca
In a survey of 500 people, 60% responded with agreement to an attitude question. Calculate a confidence interval at 95% to get an interval estimate for a porportion.
If the mass center of the body is displaced 3 cm to the left of its equilibrium position and released from rest, describe the motion as a function of time.
Two oppositely charged parallel plates with an electric field of 80 V/m have potential difference of 40 V. A tiny sphere of mass 50 mg with 2120 excess electrons is placed in the field and sits on the positive plate.
Determine the distribution function x -> P (X equal or less than x). (Hint: Remember that the life of the entire system is equal to the maximum of the lifetimes of the two copies of the item.)
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What is your unique social location? I am a 20-year-old, straight, white female, college student, living in Missouri, United States of America, and Christian.
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