Monday
July 28, 2014

Posts by Randall


Total # Posts: 21

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the temp...

Physics
How much (in Celsius degrees) is the temperature of 1.3 kg of alcohol raised by adding 4.1 kcal of heat? The following piece of information may come in handy: specific heat of alcohol is 0.58 kcal/kgC.

Physics
An aluminum calorimetry cup [mc = 0.6 kg, cc = 0.22 kcal/(kgC)] is filled with water [mw = 2.4 kg, cw = 1 kcal/(kgC)]. It is at a temperature of 30C. A sample of an unknown substance with mass mm = 2.34 kg, originally at a temperature of 210C, is added. After a while, the temp...

Physics
A weightlifter manages to lift a 133 kg (that's 293 pounds, which sounds much more impressive) weight a distance of 1.4 m. How many kcal of heat energy is equivalent to this lift?

Physics
I got 1, is that right?

Chemistry
A weightlifter manages to lift a 133 kg (that's 293 pounds, which sounds much more impressive) weight a distance of 1.4 m. How many kcal of heat energy is equivalent to this lift?

Physics
By what amount will a 178 m long concrete slab on the Mackinac Bridge contract when going from +39C to -35C? The linear expansion coefficient is 10^-5 per C.

physics
A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 2.9 km in3.4 min. How fast is the car moving after this time? Answer in units of m/s

Organic Chem
The rh=Nrh dillute the mixture diyrate the miixture by boiling to 150-160 tepure feheight for 45 minutes crank the water high to dulite.'

Organic Chem
The rh=Nrh dillute the mixture diyrate the miixture by boiling to 150-160 tepure feheight for 45 minutes crank the water high to dulite.'

Math-verify~
A parallelogram is defined by vectors OA=(4,3) and OB=(1,1). Determine the length of the diagonals OA+OB=(4,3)+(1,1) =(5,4) sqrt(5^2+4^2) =6.403 OA-OB=(3,2) sqrt(3^2+2^2)=3.60 Therefore the length of diagonals are 6.40 and 3.60 units.

Math
I have to solve the equation by finding the exact solution. Please Help. 1/4 log(x)-log(10000)=4

Math Homework
A car dealer carries out the following calculations. What is the annual percentage rate? (Round your answer to the nearest tenth.) List price $ 5,368.00 Options $ 1,625.00 Destination charges $ 200.00 Subtotal $ 7,193.00 Tax $ 431.58 Less trade-in $ 2,932.00 Amount to be finan...

Cultural Anthropology
How has this social institution of Family affected the culture of "North America," of "Asia," and/or "Europe

PLEASE HELP Math
At noon, ship A is 40 nautical miles due west of ship B. Ship A is sailing west at 24 knots and ship B is sailing north at 22 knots. How fast (in knots) is the distance between the ships changing at 6 PM? (Note: 1 knot is a speed of 1 nautical mile per hour.)

11th grade
during what holiday did german and english soldiers observe an informal truce they shared their food buried theri dead and sang together

U.S.History
during what holiday did german and english soldiers observe an informal truce they shared their food buried their dead and sang together

U.S.History
during what holiday did german and english soldiers observe an informal turce

Critical Thinking
What are some example of prejudical rhetorical device and nonprejudical devices.

MATH
23.4

math fifth grade
this number is a factor of 48. this number is even. this number is a multiple of 6 the sum of the digitsof this number equals 3

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