Saturday
July 26, 2014

Posts by tre


Total # Posts: 26

Physics
Two Train whistles, A and B each have a frequency of 408Hz. A is stationary and B is moving toward the right (away from A) at a speed of 35.0m/s. A listener is between the two whistles and is moving toward the right at a speed of 15.0m/s. What is the frequency from A and B as ...

Philosphy
Mrs. Orlof teaches two history classes, one in the morning and one in the afternoon. Yesterday she gave the same test to both classes. Anyone who failed the test must take a retest. Since a greater percentage of students who took the morning test failed the test than students ...

Physics
A body moving with uniform acceleration has a velocity of 11.1 cm/s when its x coordinate is 4.6 cm. If its x coordinate 1.75 s later is −4.29 cm, what is the x-component of its acceleration? Answer in units of cm/s2. How would I set this up?

Physics
A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 5.14 m/s 2 . She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.78 s before Kathy. Stan moves ...

calculus
If f(3) =4 g(3)=2 f'(3)=6 and g'(3)=5 find the following number (f+g)' (3)

chemistry
is this set up correct? ln(760torr/23.8torr) = -delta Hvap/ 8.31447 (1/373K - 1/298K)

chemistry
so technically (P1, T1) is 25 °C 23.8 Torr and (P1, T2) is 100 °C is 760 Torr? Or is it the other way around? so what is R?

chemistry
what is the heat of vaporization if the vapor pressure of liquid water at 25 °C is 23.8 Torr and at a boiling point of 100 °C is 760 Torr.

CHEMISTRY
if a pure liquid in a sealed container is in equilibrium with its own vapor, the dependence of the vapor pressure on the temperature and the heat of vaporization is governed by the Clausius-Clapeyron equation. what is the heat of vaporization if the vapor pressure of liquid wa...

physics
For a given velocity of projection in a projectile motion, the maximum horizontal distance is possible only at ө = 45°. Substantiate your answer with mathematical support. 20.5 m/s

Finite Matematics
The quantity demanded x each month of Russo Espresso Makers is 250 when the unit price p is $170; the quantity demanded each month is 1000 when the unit price is $140. The suppliers will market 750 espresso makers if the unit price is $90. At a unit price of $110, they are wil...

stat
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

Biology
1.The four rows of data below show the boiling points for a solution with no solute, sucrose (C12H22O11), sodium chloride (NaCl), and calcium chloride (CaCl2) (not in that order). Which boiling point corresponds to calcium chloride?

geometry
if AB=2PB, then P is the midpoint of AB

Math
Triangle GHI has i= 19 m, H=137 degrees, and I=51degrees. Find g. Happy Thanksgiving.

math
Thx :)

math
I have a question that says one rectangle has a 3x4 centimeter area. If I make another rectangle, what's the area if the scale factor is 4?

consumer math
Luis Giron works at the Pancake Palace from 3:00 p.m. until 12:15 a.m. 5 nights a week. If he takes a 30-minute break each evening, how many hours per week does he work? 46.25 hrs 44.75 hrs. 43.75 hrs.

Spanish crossword
in _________, school begins around March 1 and ends in December (2 words)

unit rate
6 eggs in 7 days

business
As an IHRM why would recruitment, selection and staffing be problematic.

5th grade
name each number in two different ways 90,000,000 40,000

Geometry
THANKS

Geometry
Is it always true, sometimes true, or never true that the circumcenter is outside its associated triangle? Is it sometime true?

college
LIST 5 TYPE OF CHEMICAL EXPLOSIONS

mathh (unit rate)
6 eggs in 7 days

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