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Cubic yards in an Irregular Shape |
2009-06-08 |
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From ron:
hi i have a berm 100'w x200'L at the base and 9'tall the top is 85'L x 20'w i would to find out how many cubic yards are in the pile and the formula
Answered by Janice Cotcher. |
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Number of Ways to Fail an Exam |
2009-06-08 |
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From shipra:
In an Exam having 9 papers, a candidate is unsucessful if he fails in more number of papers than the number of papers he passes.So in how many ways can he be unsucessful?
Answered by Janice Cotcher. |
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Initial Velocity of a Car Plunging Off a Cliff |
2009-06-07 |
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From Mimi:
A car fails to take a sharp turn on a flat road and plunges off a cliff. The car lands 65m horizontally and 43m vertically from where it left the edge of the cliff. How fast was the car travelling?
Answered by Stephen La Rocque. |
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Ground Velocity of an Aircraft |
2009-06-07 |
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From Anna:
An aircraft is flying at 180km/hr and there is a northerly wind of 35km/hr. The pilot steers the aircraft at an angle of 40 degree east of north. Which direction (in degrees east of north) is the aircraft travelling over the ground?
Answered by Stephen La Rocque. |
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Probability of Two Independent Events |
2009-06-07 |
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From Sharon:
A basketball player is given 2 freeshots, if the probability of making 1 of the 2 shots is 3/4 what is the probability of making 2 of the 2 shots or both shots?
Answered by Janice Cotcher. |
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Apparent Weight in salt water |
2009-06-06 |
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From Rob:
If an object weighs 100kg in air how much will it weigh when suspended in salt water?
Is there an easily used conversion calculation?
Answered by Janice Cotcher. |
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Possible Values of a Base of a Logarithm |
2009-06-05 |
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From nazrul:
If log base x of 25=2 then what is the value of x?
I am confused if the result be 5 or -5.
Please explain.
Thank you.
Answered by Robert J. Dawson. |
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Properties of Inequality |
2009-06-05 |
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From Nazrul:
We know that if a>b then (1/a)<(1/b)
But why 5> -2 implies (1/5)>(1/-2) .
Thank you in advance for your help.
Answered by Robert J. Dawson. |
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Linear feet into Square feet |
2009-06-04 |
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From Vickie:
Hoe do I change 10 linear feet into square feet?
Answered by Janice Cotcher. |
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Solving an Algebraeic Equation with Fractions |
2009-06-04 |
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From olivia:
solve for x
(3x-1)/4 + (x+3)/6 = 3
Answered by Janice Cotcher. |
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How long are the rafters? |
2009-06-03 |
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From Tina:
An architect designs a house that is 12 m wide. The rafters holding up the roof are equal in length and meet at an angle of 70 degrees. The rafters extend 0.3 m beyond the supporting wall. How long are the rafters?
Answered by Penny Nom. |
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All permutations of 1 - 5 |
2009-06-03 |
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From chris:
i need a list of 5 digit number combos using numbers 1-5
Answered by Penny Nom. |
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At what speed does an automobile start to hydroplane? |
2009-06-03 |
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From Don:
How do you figure at what speed does an automobile start to hydroplane when driving on a wet surface.
Answered by Robert Dawson. |
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Omega 1 |
2009-06-03 |
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From Justin:
Hello there, I was just wondering if the infinity in the extended
real number system is the same as w1 (or Omega 1, the order
structure of the real numbers) in the transfinite ordinals? Thanks
so much for your help with this question, I really appreciate it!
Sincerely,
Justin
Answered by Robert Dawson and Harley Weston. |
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An aeroplane flying in a wind |
2009-06-02 |
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From Maria:
The aeroplane flies in a wind of speed 50 kph from the direction S80◦W. However, the direction in which it is pointed, and its speed in still air,
are such that its resultant speed and direction are 800 kph, and direction N71.6◦E
I need to find the size of the angle between v and vw, in degrees to one
decimal place, and find the speed at which the aeroplane would fly if the air were
still, to the nearest kph.
It would help me greatly if I could see a diagram illustrating the velocity va that the aeroplane
would have if the air were still, the velocity vw of the wind, and
the resultant velocity v of the aeroplane (diagram should be
in the form of a triangle illustrating how one velocity vector is the
sum of the other two)
Thanks
Answered by Harley Weston. |
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