11/09/15

If the temperature is constant, the pressure of a gas in a container varies inversely as the volume of the container. If the pressure 60 pounds per square foot
If the temperature is constant, the pressure of a gas in a container varies inversely as the volume of the container. If the pressure 60 pounds per square foot in a container with 9 cubic feet,... more
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11/09/15

velocity and height
If an archer shoots an arrow straight upward with an initial velocity of 128 ft/sec from a height of 6 ft, then its height above the ground in feet at time t in seconds is given by the function... more
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10/30/15

Find Power ?
A pump is used to pump a liquid of density D continuously through a pipe of cross section area A.If liquid is flowing with speed v,then power of pump is(a) (DAv^2)/3(b) (DAv^2)/2(c) 2DAv^2(d)... more
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10/27/15

Prove : coth^2 - 1 = csch^2x
Prove : coth2 (x) - 1 = csc2 (x)   cosh2                           1 ____    -   1    =   ________   sinh2                         sinh2     Then I substituted in the definitions of sinh... more
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10/26/15

A wave on a string is measured to have a node to node segment length of 42 cm when the frequency if 125 Hz. What's the speed ?
A wave on a string is measured to have a node to node segment length of 42 cm when the frequency if 125 Hz. What is the wave speed on the string in meters per second?
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10/24/15

What is the speed of a sound wave from a 440 Hz tuning fork at temperature 23 degrees C?
What is the speed of a sound wave from a 440 Hz tuning fork at temperature 23 degrees C?
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10/13/15

Degree 4; zeros: -5+5i; -3 multiplicity 2
Degree 4; zeros: -5+5i; -3 multiplicity 2   Enter the polynomial.   f(x)=a(.......)
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10/12/15

How much heat is needed to raise the temperature of 100 degrees of water from 0 degrees to 60 degrees celsius
Free response about sig figs 
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09/28/15

The mass of an individual atom of chromium is 52.00 amu.
ow many atoms would weigh a total of 0.00001461 g of this element if the mass of 1 amu is 1.6605x10-24 g?
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09/27/15

Mole conversion?
How many moles are in 4.65X10^24 molecules of NO2? 
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09/27/15

Atom conversion , please explain step by step!
How many atoms are in 1.14 mol SO3? 
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09/24/15

valency of electrons,protons&nutrons in tabular forme
atomic weights& atomic numbers
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09/23/15

Determine the acceleration of the object during this motion
An object moving on the x axis with a constantacceleration increases its x coordinateby 196 m in a time of 3.85 s and has a velocityof 20 m/s at the end of this time. Answer in units of m/s^2
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09/22/15

y=x^2+2x+9
Find the y intercept and any x intercepts
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09/22/15

(x+5)^2=20
Solve Principle of square roots
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09/20/15

At what time do they collide in terms of D, Vo, and a
At a certain instant in time a toy car is traveling at a constant speed of Vo to the right while a distance D ahead is another toy car starting from rest and traveling to the left with constant... more
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09/17/15

radiative laws
all bodies that are above absolute zero radiate energy. Wien's law describes the peak wavelength at which that body emits. the equation for Wiens law is the following: ?max = b/T. T in this... more
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09/14/15

find the lengths of the triangle and the square
the sides of an equilateral triangle are one unit more than the sides of a square. If the sum of their perimeters is equal to 107 inches, then find the lengths of the sides of both the square and... more
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09/09/15

Writting standard form of equation through the given point and slope
Through: (4,-2) , slope=-1
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09/03/15

help me please
Fred cycled from home to his friend's house and back again.The distance between their houses is 20km.On his way to his friend's house, Fred cycled at x km/h.on the way back, Fred cycled 2 km/h... more
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08/30/15

Given f(x) = x + 2 and g(x) = x2 – 4, find the function (g/f)(x).
A.) (g/f)(x)=x-2,excluded value:x=-2   B.)(g/f)(x) =x- 4, excluded value: x=-4   C.) (g/f) (x)=x-4,excluded value:x=4   D.) (g/f) (x)=x-2, excluded value:x=2
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08/24/15

Simple Speed Comparison Problem
Dale starts walking to school at a constant speed. Five minutes after he leaves, Dale's sister Ruby realizes that Dale forgot his lunch. Ruby knows that she can run two times the speed that Dale is... more
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08/22/15

newtons law of cooling
You are making pudding for a dinner party, and you put it in the refrigerator at 5 p.m. Your refrigerator maintains a constant temperature of 40 degrees. The pudding will be ready to serve when it... more
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07/17/15

Why did scientists believe in the existence of the neutrino even though it wasn't discovered for several years after after the time of its prediction?
a. They were able to observe their tracks in cloud chambers. b. Scientists were confident in the law of Conservation of energy. c. They were able to calculate exactly how much mass was being... more
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07/15/15

Physics: frequency, harmonic number
A pop bottle style instrument is played being open at one end closed at the other, if two successive frequencies, 350 Hz and 490 Hz, are produced, what is the fundamental frequency, and what... more
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