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Post New Question
All Questions
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234931 Questions
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483
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+244
heat engine
a heat engine operates between a hot reservoir at 444 C and a cold reservoir at 111 C. What is the maximum theroretical efficicney possible this engine?
A. 46%
B.75%
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DamienDenninson
Jun 6, 2016
0
517
1
+244
relativity
You walk 30 m due north and then turn and walk 40 m due east. (a) draw a picture, (b) Calculate the distance you are from the starting point and the angle that you make relative to east (worth 1 point)
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DamienDenninson
Jun 6, 2016
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536
1
I need to know how
How do you spell out
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Guest
Jun 6, 2016
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392
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I need to know how
How do you spell out
Guest
Jun 6, 2016
0
309
0
edasedfdsfasdf
9-6[12-6]
Guest
Jun 6, 2016
0
1558
3
+16
quadratic equation pls help!
2^(3x-2)-2^(3x-3)-2^(3x-4)-4=0
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exora
Jun 6, 2016
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887
1
what is 1/3x18
1/3x18
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Guest
Jun 6, 2016
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494
0
-7(-5u - 4w + 2)
-7(-5u - 4w + 2)
Guest
Jun 6, 2016
0
682
3
Monarch Seeds
A group of students wants to help the monarch butterfly. The students are planting way stations in their neighborhoods. Each way station needs 10 plants, and only 65 percent of the seeds they plant are likely to sprout. If they want to make 15 way stations,
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Guest
Jun 6, 2016
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623
2
A Thank You Note
I appreciate everyone here that has helped me and many others this year. I'm very grateful to have people that can guide me through many difficult math related questions and I can see the true dedication each person has made on this website. There
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Guest
Jun 6, 2016
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372
1
is this a real person wats ur name
hj hi hi hi
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Guest
Jun 6, 2016
0
806
3
Cos
What is cos of 234 degrees
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Guest
Jun 6, 2016
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589
2
help
how long will it take for the population of a certain country to triple if its annual growth rate is 3.9%?
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Guest
Jun 6, 2016
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434
0
DddddxHi
Hi hi hi hih hijkdkdkddfjffnfjnf
Guest
Jun 6, 2016
0
571
1
question about circles.
how do i find the radius of a circle from it's area?
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Guest
Jun 6, 2016
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339
2
PLEASE HELP!!!
how many jars are in your mums closet if the number of jars on earth is 1/3 the amount of jars in your mums closet? there are 9.999999*10^84 jars in the world.( ͡° ͜ʖ ͡°)
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Guest
Jun 6, 2016
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510
1
triangles
who do i find the area of a triangular prisim
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Guest
Jun 6, 2016
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423
0
949.59 in standard form
949.59 in standard form
Guest
Jun 6, 2016
0
323
0
Sinusoidal Function
y=Sin(x) X= 225 Degrees
Guest
Jun 6, 2016
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366
0
Confused...
5a feet+5a feet+5a feet+12a feet+15 feet+15 feet find the perimeter
I keep getting P=27a+30 but i am not sure if this i finished.
Guest
Jun 6, 2016
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631
1
common denonomator
how do u find common denominator?
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Guest
Jun 6, 2016
0
549
2
Help
how can i change decimal to fraction
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Guest
Jun 6, 2016
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542
1
Functions
how do I determine what kind of a function it is??????
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Guest
Jun 6, 2016
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